0x1000000000000

0x1000000000000 is a hexadecimal constant. It represents the value 2^48, which equals 281,474,976,710,656 in decimal. In binary notation it is a 1 followed by 48 zero bits. In hex, it is written exactly as 0x1000000000000.

Size and memory: 2^48 bytes equals 256 tebibytes (TiB). This is a common scale in discussions of memory capacity and addressing limits on 64-bit systems. It is also used as a boundary in memory maps and file-system block limits in some contexts.

Computing context: Some 64-bit architectures implement 48-bit virtual addressing, which yields a theoretical address space of 256 TiB. In software, 0x1000000000000 is sometimes used as an offset, an alignment boundary (for example, 4 KiB is 0x1000), or a symbolic large constant.