91937798268 has 24 divisors (see below), whose sum is σ = 221441579520. Its totient is φ = 29657354160.

The previous prime is 91937798263. The next prime is 91937798279. The reversal of 91937798268 is 86289773919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91937798261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123571938 + ... + 123572681.

It is an arithmetic number, because the mean of its divisors is an integer number (9226732480).

Almost surely, 2^91937798268 is an apocalyptic number.

It is an amenable number.

91937798268 is an abundant number, since it is smaller than the sum of its proper divisors (129503781252).

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

91937798268 is a wasteful number, since it uses less digits than its factorization.

91937798268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247144657 (or 247144655 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 69.

The spelling of 91937798268 in words is "ninety-one billion, nine hundred thirty-seven million, seven hundred ninety-eight thousand, two hundred sixty-eight".