91167085836 has 36 divisors (see below), whose sum is σ = 230571532464. Its totient is φ = 30373020000.

The previous prime is 91167085829. The next prime is 91167085853. The reversal of 91167085836 is 63858076119.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×91167085836² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 597640 + ... + 734511.

Almost surely, 2^91167085836 is an apocalyptic number.

It is an amenable number.

91167085836 is an abundant number, since it is smaller than the sum of its proper divisors (139404446628).

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

91167085836 is a wasteful number, since it uses less digits than its factorization.

91167085836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334062 (or 1334057 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 91167085836 in words is "ninety-one billion, one hundred sixty-seven million, eighty-five thousand, eight hundred thirty-six".