56694649665 has 16 divisors (see below), whose sum is σ = 91609574976. Its totient is φ = 29937768000.

The previous prime is 56694649637. The next prime is 56694649679.

56694649665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56694649665 - 2⁹ = 56694649153 is a prime.

It is a super-2 number, since 2×56694649665² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56694649596 and 56694649605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18709591 + ... + 18712620.

It is an arithmetic number, because the mean of its divisors is an integer number (5725598436).

Almost surely, 2^56694649665 is an apocalyptic number.

It is an amenable number.

56694649665 is a deficient number, since it is larger than the sum of its proper divisors (34914925311).

56694649665 is a wasteful number, since it uses less digits than its factorization.

56694649665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37422320.

The product of its digits is 251942400, while the sum is 66.

The spelling of 56694649665 in words is "fifty-six billion, six hundred ninety-four million, six hundred forty-nine thousand, six hundred sixty-five".