91559560 has 32 divisors (see below), whose sum is σ = 211037400. Its totient is φ = 35729920.

The previous prime is 91559549. The next prime is 91559609. The reversal of 91559560 is 6595519.

It can be written as a sum of positive squares in 4 ways, for example, as 46212804 + 45346756 = 6798^2 + 6734^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a cake number, because a cake can be divided into 91559560 parts by 819 planar cuts.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26275 + ... + 29554.

Almost surely, 2^91559560 is an apocalyptic number.

It is an amenable number.

91559560 is an abundant number, since it is smaller than the sum of its proper divisors (119477840).

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

91559560 is a wasteful number, since it uses less digits than its factorization.

91559560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55881 (or 55877 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 91559560 is about 9568.6759794655. The cubic root of 91559560 is about 450.7141910170.

The spelling of 91559560 in words is "ninety-one million, five hundred fifty-nine thousand, five hundred sixty".