0x15A9

0x15A9 is a hexadecimal literal used in computing to denote a 16-bit value. The prefix 0x signals that the digits that follow are expressed in base 16, rather than decimal.

Interpreted as a number, 0x15A9 equals 5545 in decimal. In binary it is 0001 0101 1010 1001. This representation makes it suitable for use as a compact numeric constant, a memory offset, or a bitfield within a larger data structure, depending on the surrounding format and architecture.

Common uses include source code constants in various programming languages, where 0x15A9 may represent a specific value in a protocol, file format, or hardware register map. In low-level contexts, such a 16-bit value can serve as an address offset or as part of encoded information in a compact form. The exact meaning is determined by the system or protocol in which it appears.

In blockchain and cryptocurrency contexts, addresses are typically much longer. For example, Ethereum addresses are 40 hexadecimal digits in length after the 0x prefix. Therefore, 0x15A9 by itself is not a valid full address but could appear as a fragment within a longer hex value, identifier, or data payload.

See also: hexadecimal notation, binary representation, memory addressing, and common uses of hex literals in programming.