56640741715 has 4 divisors (see below), whose sum is σ = 67968890064. Its totient is φ = 45312593368.

The previous prime is 56640741697. The next prime is 56640741721. The reversal of 56640741715 is 51714704665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56640741715 is a prime.

It is a super-2 number, since 2×56640741715² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5664074167 + ... + 5664074176.

It is an arithmetic number, because the mean of its divisors is an integer number (16992222516).

Almost surely, 2^56640741715 is an apocalyptic number.

56640741715 is a deficient number, since it is larger than the sum of its proper divisors (11328148349).

56640741715 is a wasteful number, since it uses less digits than its factorization.

56640741715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11328148348.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 56640741715 in words is "fifty-six billion, six hundred forty million, seven hundred forty-one thousand, seven hundred fifteen".