13172368856 has 16 divisors (see below), whose sum is σ = 24700711200. Its totient is φ = 6585512544.

The previous prime is 13172368843. The next prime is 13172368861. The reversal of 13172368856 is 65886327131.

It is a super-2 number, since 2×13172368856² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4865 + ... + 162383.

It is an arithmetic number, because the mean of its divisors is an integer number (1543794450).

Almost surely, 2^13172368856 is an apocalyptic number.

It is an amenable number.

13172368856 is a deficient number, since it is larger than the sum of its proper divisors (11528342344).

13172368856 is a wasteful number, since it uses less digits than its factorization.

13172368856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167978 (or 167974 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The spelling of 13172368856 in words is "thirteen billion, one hundred seventy-two million, three hundred sixty-eight thousand, eight hundred fifty-six".