1,000,000,000


1,000,000,000 is the natural number following 999,999,999 and preceding 1,000,000,001. With a number, "billion" can be abbreviated as b, bil or bn.
In standard form, it is written as 1 × 109. The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is G.
One billion years may be called an eon in astronomy or geology.
Previously in British English, the word "billion" referred exclusively to a million millions. However, this is not common anymore, and the word has been used to mean one thousand million for several decades.
The term milliard could also be used to refer to 1,000,000,000; whereas "milliard" is rarely used in English, variations on this name often appear in other languages.
In the Indian numbering system, it is known as 100 crore or 1 Indian numbering system|.
1,000,000,000 is also the cube of 1000.
It is a common metric used in macroeconomics when describing national economies.

Sense of scale

The facts below give a sense of how large 1,000,000,000 is in the context of time according to current scientific evidence:

Time

  • 109 seconds equal 11,574 days, 1 hour, 46 minutes and 40 seconds.
  • About 109 minutes ago, the Roman Empire was flourishing and Christianity was emerging.
  • About 109 hours ago, modern human beings and their ancestors were living in the Stone Age.
  • About 109 days ago, Australopithecus, an ape-like creature related to an ancestor of modern humans, roamed the African savannas.
  • About 109 months ago, dinosaurs walked the Earth during the late Cretaceous.
  • About 109 years—a gigaannus—ago, the first multicellular eukaryotes appeared on Earth.
  • About 109 decades ago, the thin disk of the Milky Way started to form.
  • The universe is thought to be about 13.8 × 109 years old.

    Distance

  • 109 inches is, more than halfway around the world and thus sufficient to reach any point on the globe from any other point.
  • 109 metres is almost three times the distance from the Earth to the Moon.
  • 109 kilometres is over six times the distance from the Earth to the Sun.

    Area

  • A billion square inches could make a square about one half mile on a side.
  • A bolt of finely woven 1000-TC bed sheet linen with a billion thread crossings would have an area of, comparable to the floor area of a motel unit.

    Volume

  • There are one billion cubic millimetres in a cubic metre, and a billion cubic metres in a cubic kilometre.
  • A billion grains of table salt or granulated sugar would occupy a volume of about.
  • A billion cubic inches would be a volume comparable to a large commercial building slightly larger than a typical supermarket.

    Weight

  • Any object that weighs would weigh about as much as 5,525 empty Boeing 747-400s.
  • A cube of iron that weighs would be on each side.

    Products

  • As of July 2016, Apple has sold one billion iPhones. This makes the iPhone one of the most successful product lines in history, surpassing the PlayStation and the Rubik's Cube.
  • As of January 2025, Facebook has 3.065 billion users.

    Nature

  • A small mountain, slightly larger than Stone Mountain in Georgia, United States, would weigh a billion tons.
  • There are billions of worker ants in the largest ant colony in the world, which covers almost of the Mediterranean coast.
  • In 1804, the world population was one billion.

    Count

A is a cube; B consists of 1000 cubes the size of cube A, C consists of 1000 cubes the size of cube B; and D consists of 1000 cubes the size of cube C. Thus there are A-sized cubes in C; and 1,000,000,000 A-sized cubes in D.

Selected 10-digit numbers (1,000,000,000–9,999,999,999)

1,000,000,000 to 1,999,999,999

  • 1,000,000,007 : smallest prime number with 10 digits.
  • 1,000,006,281 : smallest triangular number with 10 digits and the 44,721st triangular number.
  • 1,000,014,129 = 316232, the smallest ten-digit square.
  • 1,003,003,001 = 10013.
  • 1,026,753,849 = 320432, the smallest pandigital square in base 10.
  • 1,069,863,695 : number of square -matrices without zero rows and with exactly 9 entries equal to 1
  • 1,073,741,824 = 327682 = 10243 = 645 = 326 = 810 = 415 = 230
  • 1,073,742,724 : Leyland number using 2 and 30
  • 1,073,792,449 : Leyland number using 4 and 15
  • 1,093,104,961 : number of rooted trimmed trees with 28 nodes
  • 1,096,671,326 : number of uniform rooted trees with 26 nodes
  • 1,104,891,746 : number of partially ordered set with 12 unlabeled elements
  • 1,111,111,111 : repunit.
  • 1,129,760,415 : 23rd Motzkin number.
  • 1,134,903,170 : 45th Fibonacci number.
  • 1,160,290,625 = 655
  • 1,162,261,467 = 319
  • 1,162,268,326 : Leyland number using 3 and 19
  • 1,163,962,800 : smallest superabundant number that is not highly composite
  • 1,166,732,814 : number of signed trees with 17 nodes
  • 1,173,741,824 : Leyland number using 8 and 10
  • 1,220,703,125 = 513
  • 1,221,074,418 : Leyland number using 5 and 13
  • 1,252,332,576 = 665
  • 1,280,000,000 = 207
  • 1,291,467,969 = 359372 = 10893 = 336
  • 1,311,738,121 : 25th Pell number.
  • 1,350,125,107 = 675
  • 1,382,958,545 : 15th Bell number.
  • 1,392,251,012 : number of secondary structures of RNA molecules with 27 nucleotides
  • 1,405,695,061 : Markov prime.
  • 1,406,818,759 : 30th Wedderburn–Etherington number.
  • 1,421,542,641 : logarithmic number.
  • 1,453,933,568 = 685
  • 1,464,407,113 : number of series-reduced trees with 39 nodes
  • 1,475,789,056 = 384162 = 1964 = 148
  • 1,528,823,808 = 11523
  • 1,533,776,805 : both pentagonal and triangular.
  • 1,544,804,416 = 393042 = 11563 = 346
  • 1,564,031,349 = 695
  • 1,606,879,040 : Dowling number
  • 1,631,432,881 = 403912, square triangular number
  • 1,673,196,525 : Least common multiple of the odd integers from 1 to 25
  • 1,677,922,740 : number of series-reduced planted trees with 36 nodes
  • 1,680,700,000 = 705
  • 1,755,206,648 : coefficient of a ménage hit polynomial
  • 1,767,263,190 : The 19th Catalan number.
  • 1,787,109,376 : 1-automorphic number
  • 1,801,088,541 = 217
  • 1,804,229,351 = 715
  • 1,808,141,741 : number of partitions of 280 into divisors of 280
  • 1,808,676,326 : number of 38-bead necklaces where complements are equivalent
  • 1,836,311,903 : 46th Fibonacci number.
  • 1,838,265,625 = 428752 = 12253 = 356
  • 1,848,549,332 : number of partitions of 270 into divisors of 270
  • 1,857,283,156 : number of 37-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed
  • 1,882,341,361 : The smallest prime whose reversal is a square triangular number.
  • 1,921,525,212 : number of partitions of 264 into divisors of 264
  • 1,934,502,740 : number of parallelogram polyominoes with 27 cells.
  • 1,934,917,632 = 725
  • 1,977,326,743 = 711
  • 1,979,339,339 : largest right-truncatable prime in decimal, if 1 is considered to be a prime
  • 1,996,813,914 : Leyland number using 7 and 11

    2,000,000,000 to 2,999,999,999

  • 2,023,443,032 : number of trees with 28 unlabeled nodes
  • 2,038,074,743 : 100,000,000th prime number
  • 2,062,142,876 : number of centered hydrocarbons with 30 carbon atoms
  • 2,073,071,593 = 735
  • 2,147,483,647 : 8th Mersenne prime, 3rd double Mersenne prime, and the largest signed 32-bit integer.
  • 2,147,483,648 = 231
  • 2,147,484,609 : Leyland number using 2 and 31
  • 2,176,782,336 = 466562 = 12963 = 2164 = 366 = 612
  • 2,179,768,320 : Leyland number using 6 and 12
  • 2,214,502,422 : 6th primary pseudoperfect number.
  • 2,219,006,624 = 745
  • 2,222,222,222 : repdigit
  • 2,276,423,485 : number of ways to partition and then partition each cell into subcells.
  • 2,357,947,691 = 13313 = 119
  • 2,373,046,875 = 755
  • 2,494,357,888 = 227
  • 2,521,008,887 : 4th Mills' prime
  • 2,535,525,376 = 765
  • 2,562,890,625 = 506252 = 2254 = 158
  • 2,565,726,409 = 506532 = 13693 = 376
  • 2,573,571,875 = 55×77
  • 2,695,730,992 : number of rooted trimmed trees with 29 nodes
  • 2,706,784,157 = 775
  • 2,870,671,950 : number of free 20-ominoes
  • 2,873,403,980 : number of uniform rooted trees with 27 nodes
  • 2,834,510,744 : number of nonequivalent dissections of a 22-gon into 19 polygons by non-intersecting diagonals up to rotation
  • 2,887,174,368 = 785
  • 2,971,215,073 : 11th Fibonacci prime and a Markov prime.