56918081965 has 16 divisors (see below), whose sum is σ = 68615859456. Its totient is φ = 45325508800.

The previous prime is 56918081951. The next prime is 56918081977.

56918081965 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56918081965 - 2⁹ = 56918081453 is a prime.

It is a super-2 number, since 2×56918081965² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924855 + ... + 984475.

It is an arithmetic number, because the mean of its divisors is an integer number (4288491216).

Almost surely, 2^56918081965 is an apocalyptic number.

It is an amenable number.

56918081965 is a deficient number, since it is larger than the sum of its proper divisors (11697777491).

56918081965 is a wasteful number, since it uses less digits than its factorization.

56918081965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60500.

The product of its (nonzero) digits is 4665600, while the sum is 58.

The spelling of 56918081965 in words is "fifty-six billion, nine hundred eighteen million, eighty-one thousand, nine hundred sixty-five".