123397115256 has 80 divisors (see below), whose sum is σ = 349790502600. Its totient is φ = 40636783296.

The previous prime is 123397115203. The next prime is 123397115293. The reversal of 123397115256 is 652511793321.

123397115256 is a `hidden beast` number, since 1 + 2 + 3 + 397 + 1 + 1 + 5 + 256 = 666.

123397115256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1093371 + ... + 1200938.

Almost surely, 2^123397115256 is an apocalyptic number.

It is an amenable number.

123397115256 is an abundant number, since it is smaller than the sum of its proper divisors (226393387344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123397115256 is a wasteful number, since it uses less digits than its factorization.

123397115256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294410 (or 2294397 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The spelling of 123397115256 in words is "one hundred twenty-three billion, three hundred ninety-seven million, one hundred fifteen thousand, two hundred fifty-six".