56783638765 has 32 divisors (see below), whose sum is σ = 82472753664. Its totient is φ = 36639283200.

The previous prime is 56783638753. The next prime is 56783638771.

56783638765 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56783638765 - 2²³ = 56775250157 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 56783638697 and 56783638706.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 4805865 + ... + 4817665.

It is an arithmetic number, because the mean of its divisors is an integer number (2577273552).

Almost surely, 2^56783638765 is an apocalyptic number.

It is an amenable number.

56783638765 is a deficient number, since it is larger than the sum of its proper divisors (25689114899).

56783638765 is a wasteful number, since it uses less digits than its factorization.

56783638765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19917.

The product of its digits is 152409600, while the sum is 64.

The spelling of 56783638765 in words is "fifty-six billion, seven hundred eighty-three million, six hundred thirty-eight thousand, seven hundred sixty-five".