123513306256 has 40 divisors (see below), whose sum is σ = 239905754424. Its totient is φ = 61602309120.

The previous prime is 123513306233. The next prime is 123513306281. The reversal of 123513306256 is 652603315321.

123513306256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20510822656 + 103002483600 = 143216^2 + 320940^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15333526 + ... + 15341578.

Almost surely, 2^123513306256 is an apocalyptic number.

123513306256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123513306256 is a deficient number, since it is larger than the sum of its proper divisors (116392448168).

123513306256 is a wasteful number, since it uses less digits than its factorization.

123513306256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339 (or 10333 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 123513306256 in words is "one hundred twenty-three billion, five hundred thirteen million, three hundred six thousand, two hundred fifty-six".