13120552256 has 56 divisors (see below), whose sum is σ = 29766743616. Its totient is φ = 5620976640.

The previous prime is 13120552243. The next prime is 13120552261. The reversal of 13120552256 is 65225502131.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 1993451 + ... + 2000021.

Almost surely, 2^13120552256 is an apocalyptic number.

13120552256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13120552256 is an abundant number, since it is smaller than the sum of its proper divisors (16646191360).

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

13120552256 is an equidigital number, since it uses as much as digits as its factorization.

13120552256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11047 (or 11037 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 13120552256 in words is "thirteen billion, one hundred twenty million, five hundred fifty-two thousand, two hundred fifty-six".