556172604 has 72 divisors (see below), whose sum is σ = 1554993440. Its totient is φ = 166499712.

The previous prime is 556172599. The next prime is 556172611. The reversal of 556172604 is 406271655.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1257 + ... + 33375.

Almost surely, 2^556172604 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 556172604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777496720).

556172604 is an abundant number, since it is smaller than the sum of its proper divisors (998820836).

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

556172604 is a wasteful number, since it uses less digits than its factorization.

556172604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32179 (or 32174 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 556172604 is about 23583.3119811446. The cubic root of 556172604 is about 822.3749332969.

The spelling of 556172604 in words is "five hundred fifty-six million, one hundred seventy-two thousand, six hundred four".