91313094640 has 20 divisors (see below), whose sum is σ = 212302945224. Its totient is φ = 36525237824.

The previous prime is 91313094637. The next prime is 91313094671. The reversal of 91313094640 is 4649031319.

It is a tau number, because it is divible by the number of its divisors (20).

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

It is a junction number, because it is equal to n+sod(n) for n = 91313094593 and 91313094602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570706762 + ... + 570706921.

Almost surely, 2^91313094640 is an apocalyptic number.

It is an amenable number.

91313094640 is an abundant number, since it is smaller than the sum of its proper divisors (120989850584).

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

91313094640 is a wasteful number, since it uses less digits than its factorization.

91313094640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141413696 (or 1141413690 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 91313094640 in words is "ninety-one billion, three hundred thirteen million, ninety-four thousand, six hundred forty".