91955574988 has 6 divisors (see below), whose sum is σ = 160922256236. Its totient is φ = 45977787492.

The previous prime is 91955574983. The next prime is 91955575009. The reversal of 91955574988 is 88947555919.

It is not an unprimeable number, because it can be changed into a prime (91955574983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11494446870 + ... + 11494446877.

Almost surely, 2^91955574988 is an apocalyptic number.

It is an amenable number.

91955574988 is a deficient number, since it is larger than the sum of its proper divisors (68966681248).

91955574988 is a wasteful number, since it uses less digits than its factorization.

91955574988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22988893751 (or 22988893749 counting only the distinct ones).

The product of its digits is 163296000, while the sum is 70.

The spelling of 91955574988 in words is "ninety-one billion, nine hundred fifty-five million, five hundred seventy-four thousand, nine hundred eighty-eight".