18446744073709551616
18446744073709551616 is the decimal representation of 2^64, a fundamental power of two in computer science. It is the smallest integer greater than the maximum value representable by an unsigned 64-bit integer, which is 18446744073709551615 (2^64 − 1). In binary, 2^64 equals a 1 followed by 64 zeros, and in hexadecimal it is 0x10000000000000000. The value is also the size of the 64-bit unsigned integer space: there are 2^64 distinct values that can be stored, from 0 to 2^64 − 1.
In modular arithmetic with modulus 2^64, the equivalence class of 2^64 is 0. This property underlies wraparound
The concept is central in discussions of 64-bit architecture and memory addressing. If a system uses one-byte
Because of its role as a modulus and boundary, 2^64 appears in algorithm design, cryptography, and tests