91057274472 has 32 divisors (see below), whose sum is σ = 227658672000. Its totient is φ = 30350360064.

The previous prime is 91057274387. The next prime is 91057274479. The reversal of 91057274472 is 27447275019.

It is not an unprimeable number, because it can be changed into a prime (91057274479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254353 + ... + 496799.

It is an arithmetic number, because the mean of its divisors is an integer number (7114333500).

Almost surely, 2^91057274472 is an apocalyptic number.

It is an amenable number.

91057274472 is an abundant number, since it is smaller than the sum of its proper divisors (136601397528).

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

91057274472 is a wasteful number, since it uses less digits than its factorization.

91057274472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258105 (or 258101 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 91057274472 in words is "ninety-one billion, fifty-seven million, two hundred seventy-four thousand, four hundred seventy-two".