91976120688 has 20 divisors (see below), whose sum is σ = 237604978568. Its totient is φ = 30658706880.

The previous prime is 91976120681. The next prime is 91976120711. The reversal of 91976120688 is 88602167919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91976120681) 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 3 ways as a sum of consecutive naturals, for example, 958084543 + ... + 958084638.

Almost surely, 2^91976120688 is an apocalyptic number.

It is an amenable number.

91976120688 is an abundant number, since it is smaller than the sum of its proper divisors (145628857880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91976120688 is a wasteful number, since it uses less digits than its factorization.

91976120688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916169192 (or 1916169186 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 57.

The spelling of 91976120688 in words is "ninety-one billion, nine hundred seventy-six million, one hundred twenty thousand, six hundred eighty-eight".