110111111

110111111 is a binary numeral consisting of nine digits. In binary (base 2) it represents the value 110111111, which equals 447 in decimal. As a nine-bit number, it lies between 2^8 (256) and 2^9−1 (511) and is not a power of two. The pattern can be used as an example in discussions of fixed-width representations or bit-level arithmetic.

Its binary form contains six trailing ones. From most to least significant, the digits are two leading ones, followed by a zero, and then six ones: 11 0 111111. Consequently, the least-significant six bits are all 1, the seventh bit from the right is 0, and the most-significant two bits are 1. These properties influence parity and certain bitwise results when this value participates in operations.

Historically and practically, 110111111 does not designate a widely recognized standard or symbol; it is primarily notable as an explicit example of a nine-bit binary number. In decimal form its value is 447, with prime factorization 3 × 149. In computing contexts, such nine-bit patterns may appear in memory addressing, encoding schemes, or test vectors used to validate hardware or software.

See also: binary numeral system, decimal numeral system, fixed-width integers, bitwise operations.