977656656779 has 32 divisors (see below), whose sum is σ = 1114834710528. Its totient is φ = 849298320000.

The previous prime is 977656656763. The next prime is 977656656793.

977656656779 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 977656656779 - 2⁴ = 977656656763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (977656656719) 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 31 ways as a sum of consecutive naturals, for example, 12808442 + ... + 12884544.

It is an arithmetic number, because the mean of its divisors is an integer number (34838584704).

Almost surely, 2^977656656779 is an apocalyptic number.

977656656779 is a deficient number, since it is larger than the sum of its proper divisors (137178053749).

977656656779 is a wasteful number, since it uses less digits than its factorization.

977656656779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76619.

The product of its digits is 6301184400, while the sum is 80.

The spelling of 977656656779 in words is "nine hundred seventy-seven billion, six hundred fifty-six million, six hundred fifty-six thousand, seven hundred seventy-nine".