56234195991 has 12 divisors (see below), whose sum is σ = 81439258368. Its totient is φ = 37391577984.

The previous prime is 56234195981. The next prime is 56234195993. The reversal of 56234195991 is 19959143265.

56234195991 is a `hidden beast` number, since 5 + 6 + 2 + 3 + 41 + 9 + 599 + 1 = 666.

It is not a de Polignac number, because 56234195991 - 2¹¹ = 56234193943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56234195993) 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, 8153530 + ... + 8160423.

It is an arithmetic number, because the mean of its divisors is an integer number (6786604864).

Almost surely, 2^56234195991 is an apocalyptic number.

56234195991 is a deficient number, since it is larger than the sum of its proper divisors (25205062377).

56234195991 is a wasteful number, since it uses less digits than its factorization.

56234195991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16314342 (or 16314339 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The spelling of 56234195991 in words is "fifty-six billion, two hundred thirty-four million, one hundred ninety-five thousand, nine hundred ninety-one".