91947477268 has 12 divisors (see below), whose sum is σ = 162175078912. Its totient is φ = 45611740440.

The previous prime is 91947477247. The next prime is 91947477311. The reversal of 91947477268 is 86277474919.

It is a happy number.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90498978 + ... + 90499993.

Almost surely, 2^91947477268 is an apocalyptic number.

It is an amenable number.

91947477268 is a deficient number, since it is larger than the sum of its proper divisors (70227601644).

91947477268 is a wasteful number, since it uses less digits than its factorization.

91947477268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180999102 (or 180999100 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 64.

The spelling of 91947477268 in words is "ninety-one billion, nine hundred forty-seven million, four hundred seventy-seven thousand, two hundred sixty-eight".