91757044428 has 48 divisors (see below), whose sum is σ = 244833490944. Its totient is φ = 26200437120.

The previous prime is 91757044391. The next prime is 91757044433. The reversal of 91757044428 is 82444075719.

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, 190428 + ... + 468803.

It is an arithmetic number, because the mean of its divisors is an integer number (5100697728).

Almost surely, 2^91757044428 is an apocalyptic number.

It is an amenable number.

91757044428 is an abundant number, since it is smaller than the sum of its proper divisors (153076446516).

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

91757044428 is a wasteful number, since it uses less digits than its factorization.

91757044428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660902 (or 660900 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 91757044428 in words is "ninety-one billion, seven hundred fifty-seven million, forty-four thousand, four hundred twenty-eight".