56172888999 has 12 divisors (see below), whose sum is σ = 81326879712. Its totient is φ = 37361702400.

The previous prime is 56172888973. The next prime is 56172889033. The reversal of 56172888999 is 99988827165.

It is not a de Polignac number, because 56172888999 - 2¹¹ = 56172886951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56172888929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7236762 + ... + 7244519.

It is an arithmetic number, because the mean of its divisors is an integer number (6777239976).

Almost surely, 2^56172888999 is an apocalyptic number.

56172888999 is a deficient number, since it is larger than the sum of its proper divisors (25153990713).

56172888999 is a wasteful number, since it uses less digits than its factorization.

56172888999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481718 (or 14481715 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 72.

The spelling of 56172888999 in words is "fifty-six billion, one hundred seventy-two million, eight hundred eighty-eight thousand, nine hundred ninety-nine".