56986646591 has 64 divisors (see below), whose sum is σ = 72926438400. Its totient is φ = 43430639616.

The previous prime is 56986646579. The next prime is 56986646597. The reversal of 56986646591 is 19564668965.

It is a de Polignac number, because none of the positive numbers 2^k-56986646591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56986646597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23098340 + ... + 23100806.

It is an arithmetic number, because the mean of its divisors is an integer number (1139475600).

Almost surely, 2^56986646591 is an apocalyptic number.

56986646591 is a deficient number, since it is larger than the sum of its proper divisors (15939791809).

56986646591 is a wasteful number, since it uses less digits than its factorization.

56986646591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688.

The product of its digits is 83980800, while the sum is 65.

The spelling of 56986646591 in words is "fifty-six billion, nine hundred eighty-six million, six hundred forty-six thousand, five hundred ninety-one".