556172838928 has 80 divisors (see below), whose sum is σ = 1241451792000. Its totient is φ = 236445152256.

The previous prime is 556172838829. The next prime is 556172838929. The reversal of 556172838928 is 829838271655.

It is a super-2 number, since 2×556172838928² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 556172838928.

It is not an unprimeable number, because it can be changed into a prime (556172838929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8165718 + ... + 8233546.

It is an arithmetic number, because the mean of its divisors is an integer number (15518147400).

Almost surely, 2^556172838928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556172838928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620725896000).

556172838928 is an abundant number, since it is smaller than the sum of its proper divisors (685278953072).

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

556172838928 is a wasteful number, since it uses less digits than its factorization.

556172838928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68432 (or 68426 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 64.

The spelling of 556172838928 in words is "five hundred fifty-six billion, one hundred seventy-two million, eight hundred thirty-eight thousand, nine hundred twenty-eight".