# Creating Strings: Factorial and Integer Size ``` Number Value A Little Over -------- -------------------- ---------------------------- 10! 3628800 3 x 10^6 ( 3 million) 11! 39916800 39 x 10^6 ( 39 million) 12! 479001600 479 x 10^6 (479 million) 2^31 - 1 2147483647 2 x 10^9 ( 2 billion) 2^32 - 1 4294967295 4 x 10^9 ( 4 billion) 13! 6227020800 6 x 10^9 ( 6 billion) 14! 87178291200 87 x 10^9 ( 87 billion) 15! 1307674368000 1 x 10^12 ( 1 trillion) 16! 20922789888000 20 x 10^12 ( 12 trillion) 17! 355687428096000 355 x 10^12 (355 trillion) 18! 6402373705728000 6 x 10^15 ( 6 quadrillion) 19! 121645100408832000 121 x 10^15 (121 quadrillion) 20! 2432902008176640000 2 x 10^18 ( 2 quintillion) 2^63 - 1 9223372036854775807 9 x 10^18 ( 9 quintillion) 2^64 - 1 18446744073709551615 18 x 10^18 ( 18 quintillion) 21! 51090942171709440000 51 x 10^18 ( 51 quintillion) ```