91579560 has 64 divisors (see below), whose sum is σ = 286692480. Its totient is φ = 23358720.

The previous prime is 91579559. The next prime is 91579591. The reversal of 91579560 is 6597519.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13831 + ... + 19350.

It is an arithmetic number, because the mean of its divisors is an integer number (4479570).

Almost surely, 2^91579560 is an apocalyptic number.

It is an amenable number.

91579560 is an abundant number, since it is smaller than the sum of its proper divisors (195112920).

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

91579560 is a wasteful number, since it uses less digits than its factorization.

91579560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33218 (or 33214 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 91579560 is about 9569.7209990678. The cubic root of 91579560 is about 450.7470061869.

The spelling of 91579560 in words is "ninety-one million, five hundred seventy-nine thousand, five hundred sixty".