56997641565 has 48 divisors (see below), whose sum is σ = 104646145968. Its totient is φ = 28599994368.

The previous prime is 56997641537. The next prime is 56997641579. The reversal of 56997641565 is 56514679965.

56997641565 is a `hidden beast` number, since 5 + 6 + 9 + 9 + 7 + 64 + 1 + 565 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 181198521 + 56816443044 = 13461^2 + 238362^2 .

It is not a de Polignac number, because 56997641565 - 2⁶ = 56997641501 is a prime.

It is a super-2 number, since 2×56997641565² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2311039 + ... + 2335571.

It is an arithmetic number, because the mean of its divisors is an integer number (2180128041).

Almost surely, 2^56997641565 is an apocalyptic number.

It is an amenable number.

56997641565 is a deficient number, since it is larger than the sum of its proper divisors (47648504403).

56997641565 is a wasteful number, since it uses less digits than its factorization.

56997641565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27598 (or 27595 counting only the distinct ones).

The product of its digits is 61236000, while the sum is 63.

The spelling of 56997641565 in words is "fifty-six billion, nine hundred ninety-seven million, six hundred forty-one thousand, five hundred sixty-five".