91318979328 has 144 divisors (see below), whose sum is σ = 247692917472. Its totient is φ = 29859840000.

The previous prime is 91318979327. The next prime is 91318979357. The reversal of 91318979328 is 82397981319.

It is not an unprimeable number, because it can be changed into a prime (91318979321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18783618 + ... + 18788478.

Almost surely, 2^91318979328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91318979328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123846458736).

91318979328 is an abundant number, since it is smaller than the sum of its proper divisors (156373938144).

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

91318979328 is a wasteful number, since it uses less digits than its factorization.

91318979328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5342 (or 5328 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 60.

The spelling of 91318979328 in words is "ninety-one billion, three hundred eighteen million, nine hundred seventy-nine thousand, three hundred twenty-eight".