56172888972 has 18 divisors (see below), whose sum is σ = 141992580548. Its totient is φ = 18724296312.

The previous prime is 56172888953. The next prime is 56172888973. The reversal of 56172888972 is 27988827165.

56172888972 is a `hidden beast` number, since 5 + 617 + 2 + 8 + 8 + 8 + 9 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (56172888973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 780178978 + ... + 780179049.

Almost surely, 2^56172888972 is an apocalyptic number.

It is an amenable number.

56172888972 is an abundant number, since it is smaller than the sum of its proper divisors (85819691576).

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

56172888972 is a wasteful number, since it uses less digits than its factorization.

56172888972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560358037 (or 1560358032 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The spelling of 56172888972 in words is "fifty-six billion, one hundred seventy-two million, eight hundred eighty-eight thousand, nine hundred seventy-two".