91957656 has 64 divisors (see below), whose sum is σ = 271226880. Its totient is φ = 25424640.

The previous prime is 91957651. The next prime is 91957667. The reversal of 91957656 is 65675919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91957651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3621 + ... + 14036.

It is an arithmetic number, because the mean of its divisors is an integer number (4237920).

Almost surely, 2^91957656 is an apocalyptic number.

It is an amenable number.

91957656 is an abundant number, since it is smaller than the sum of its proper divisors (179269224).

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

91957656 is a wasteful number, since it uses less digits than its factorization.

91957656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17704 (or 17700 counting only the distinct ones).

The product of its digits is 510300, while the sum is 48.

The square root of 91957656 is about 9589.4554589924. The cubic root of 91957656 is about 451.3664735163.

The spelling of 91957656 in words is "ninety-one million, nine hundred fifty-seven thousand, six hundred fifty-six".