56877975661 has 12 divisors (see below), whose sum is σ = 61602941568. Its totient is φ = 52491510864.

The previous prime is 56877975647. The next prime is 56877975667. The reversal of 56877975661 is 16657977865.

It is not a de Polignac number, because 56877975661 - 2⁵ = 56877975629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56877975667) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 815386 + ... + 882388.

It is an arithmetic number, because the mean of its divisors is an integer number (5133578464).

Almost surely, 2^56877975661 is an apocalyptic number.

It is an amenable number.

56877975661 is a deficient number, since it is larger than the sum of its proper divisors (4724965907).

56877975661 is a wasteful number, since it uses less digits than its factorization.

56877975661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72052 (or 72039 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 67.

The spelling of 56877975661 in words is "fifty-six billion, eight hundred seventy-seven million, nine hundred seventy-five thousand, six hundred sixty-one".