56051054991 has 12 divisors (see below), whose sum is σ = 80965845168. Its totient is φ = 37365888384.

The previous prime is 56051054987. The next prime is 56051055017. The reversal of 56051054991 is 19945015065.

It is a happy number.

56051054991 is a `hidden beast` number, since 5 + 6 + 0 + 5 + 10 + 549 + 91 = 666.

It is not a de Polignac number, because 56051054991 - 2² = 56051054987 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56051054911) 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, 147406 + ... + 365828.

It is an arithmetic number, because the mean of its divisors is an integer number (6747153764).

Almost surely, 2^56051054991 is an apocalyptic number.

56051054991 is a deficient number, since it is larger than the sum of its proper divisors (24914790177).

56051054991 is a wasteful number, since it uses less digits than its factorization.

56051054991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246942 (or 246939 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The spelling of 56051054991 in words is "fifty-six billion, fifty-one million, fifty-four thousand, nine hundred ninety-one".