10556507172 has 12 divisors (see below), whose sum is σ = 24631850096. Its totient is φ = 3518835720.

The previous prime is 10556507147. The next prime is 10556507191. The reversal of 10556507172 is 27170565501.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×10556507172² (a number of 21 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 10556507172.

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, 439854454 + ... + 439854477.

Almost surely, 2^10556507172 is an apocalyptic number.

10556507172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10556507172 is an abundant number, since it is smaller than the sum of its proper divisors (14075342924).

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

10556507172 is a wasteful number, since it uses less digits than its factorization.

10556507172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879708938 (or 879708936 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 39.

The spelling of 10556507172 in words is "ten billion, five hundred fifty-six million, five hundred seven thousand, one hundred seventy-two".