1125899906842624

1125899906842624 is the decimal representation of 2^50. In binary, it is a 1 followed by 50 zeros, and in hexadecimal it is 0x4000000000000. As a power of two, its prime factorization is 2^50, so its divisors are exactly the powers of two from 2^0 up to 2^50, totaling 51 divisors; the sum of its divisors equals 2^51 − 1.

In computing and digital storage, 2^50 bytes constitute one pebibyte (PiB), a binary unit of storage. The exact decimal value is 1,125,899,906,842,624 bytes. This is about 1.1259 quadrillion bytes, or roughly 1.125 petabytes (in decimal terms). The distinction between PiB and PB arises from binary versus decimal prefixes, with PiB representing 2^50 bytes and PB representing 10^15 bytes.

The number is commonly encountered in discussions of large-scale memory, data centers, and capacity planning, where binary-based units are used for clarity about addressable space. It also arises from the identity 1024^5 = (2^10)^5 = 2^50, linking the value to a familiar 1024-based progression used in computing.

Overall, 1125899906842624 is notable primarily as the decimal form of the 51st power-of-two, 2^50, and as the definitive binary-scale unit of one pebibyte in storage terminology.