91968977656 has 16 divisors (see below), whose sum is σ = 172517866200. Its totient is φ = 45964213344.

The previous prime is 91968977651. The next prime is 91968977663. The reversal of 91968977656 is 65677986919.

It is a super-3 number, since 3×91968977656³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91968977651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2515150 + ... + 2551453.

Almost surely, 2^91968977656 is an apocalyptic number.

It is an amenable number.

91968977656 is a deficient number, since it is larger than the sum of its proper divisors (80548888544).

91968977656 is a wasteful number, since it uses less digits than its factorization.

91968977656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068878 (or 5068874 counting only the distinct ones).

The product of its digits is 308629440, while the sum is 73.

The spelling of 91968977656 in words is "ninety-one billion, nine hundred sixty-eight million, nine hundred seventy-seven thousand, six hundred fifty-six".