91315364724 has 36 divisors (see below), whose sum is σ = 230839467040. Its totient is φ = 30436540560.

The previous prime is 91315364689. The next prime is 91315364759. The reversal of 91315364724 is 42746351319.

91315364724 is a `hidden beast` number, since 91 + 3 + 1 + 536 + 4 + 7 + 24 = 666.

It is an interprime number because it is at equal distance from previous prime (91315364689) and next prime (91315364759).

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

It is a self number, because there is not a number n which added to its sum of digits gives 91315364724.

It is a congruent number.

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, 573987 + ... + 715605.

Almost surely, 2^91315364724 is an apocalyptic number.

It is an amenable number.

91315364724 is an abundant number, since it is smaller than the sum of its proper divisors (139524102316).

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

91315364724 is a wasteful number, since it uses less digits than its factorization.

91315364724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159540 (or 159535 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 91315364724 in words is "ninety-one billion, three hundred fifteen million, three hundred sixty-four thousand, seven hundred twenty-four".