56515371717 has 48 divisors (see below), whose sum is σ = 90555763200. Its totient is φ = 31228001280.

The previous prime is 56515371707. The next prime is 56515371791. The reversal of 56515371717 is 71717351565.

It is not a de Polignac number, because 56515371717 - 2⁴ = 56515371701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515371707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6781209 + ... + 6789537.

It is an arithmetic number, because the mean of its divisors is an integer number (1886578400).

Almost surely, 2^56515371717 is an apocalyptic number.

It is an amenable number.

56515371717 is a deficient number, since it is larger than the sum of its proper divisors (34040391483).

56515371717 is a wasteful number, since it uses less digits than its factorization.

56515371717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9866 (or 9859 counting only the distinct ones).

The product of its digits is 771750, while the sum is 48.

The spelling of 56515371717 in words is "fifty-six billion, five hundred fifteen million, three hundred seventy-one thousand, seven hundred seventeen".