91236531960 has 192 divisors, whose sum is σ = 345794904000. Its totient is φ = 20854036224.

The previous prime is 91236531941. The next prime is 91236531973. The reversal of 91236531960 is 6913563219.

91236531960 is a `hidden beast` number, since 9 + 1 + 23 + 6 + 531 + 96 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 245959 + ... + 492918.

It is an arithmetic number, because the mean of its divisors is an integer number (1801015125).

Almost surely, 2^91236531960 is an apocalyptic number.

91236531960 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91236531960 is an abundant number, since it is smaller than the sum of its proper divisors (254558372040).

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

91236531960 is a wasteful number, since it uses less digits than its factorization.

91236531960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738915 (or 738894 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 91236531960 in words is "ninety-one billion, two hundred thirty-six million, five hundred thirty-one thousand, nine hundred sixty".