0x1000000000000000

0x1000000000000000 is a hexadecimal integer literal that represents the value 2^60. In decimal form, it equals 1,152,921,504,606,846,976. The hex representation is a 1 followed by fifteen zeros, making it a 16-digit hex number. This value sits at a high bit position in a 64-bit range, corresponding to bit 60 being set.

In data storage terms, 2^60 bytes is one exbibyte (EiB). The exbibyte is part of the binary prefix series used for measuring large data sizes, distinct from the decimal exabyte (EB). As a result, 0x1000000000000000 is sometimes encountered in discussions of memory capacity, large-scale storage, and systems design.

As a programming and computing constant, 0x1000000000000000 is often used to denote a power-of-two boundary or as a component in bitwise operations, shifts, and masks. Because it represents a single high-order bit, it can serve as a convenient constant in low-level code, hardware descriptions, and performance-critical calculations where precise alignment or threshold values are important. It also serves as a clear illustration of how hexadecimal notation encodes large powers of two.

Related concepts include the power-of-two sequence (2^n), the exbibyte unit (EiB) for binary data sizes, and binary versus decimal prefixes for data storage. The specific value of 0x1000000000000000 emphasizes the relationship between hexadecimal representation and binary magnitude in computing contexts.