56613431665 has 16 divisors (see below), whose sum is σ = 77655432960. Its totient is φ = 38813561280.

The previous prime is 56613431621. The next prime is 56613431669.

It is a happy number.

56613431665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56613431665 - 2²³ = 56605043057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56613431669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51031 + ... + 340339.

It is an arithmetic number, because the mean of its divisors is an integer number (4853464560).

Almost surely, 2^56613431665 is an apocalyptic number.

It is an amenable number.

56613431665 is a deficient number, since it is larger than the sum of its proper divisors (21042001295).

56613431665 is a wasteful number, since it uses less digits than its factorization.

56613431665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294912.

The product of its digits is 1166400, while the sum is 46.

The spelling of 56613431665 in words is "fifty-six billion, six hundred thirteen million, four hundred thirty-one thousand, six hundred sixty-five".