91259568344 has 64 divisors (see below), whose sum is σ = 209732716800. Its totient is φ = 36353625984.

The previous prime is 91259568319. The next prime is 91259568409. The reversal of 91259568344 is 44386595219.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 91259568344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752762 + ... + 865545.

It is an arithmetic number, because the mean of its divisors is an integer number (3277073700).

Almost surely, 2^91259568344 is an apocalyptic number.

It is an amenable number.

91259568344 is an abundant number, since it is smaller than the sum of its proper divisors (118473148456).

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

91259568344 is a wasteful number, since it uses less digits than its factorization.

91259568344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618392 (or 1618388 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 56.

The spelling of 91259568344 in words is "ninety-one billion, two hundred fifty-nine million, five hundred sixty-eight thousand, three hundred forty-four".