91764767328 has 192 divisors, whose sum is σ = 265087033344. Its totient is φ = 27622656000.

The previous prime is 91764767327. The next prime is 91764767357. The reversal of 91764767328 is 82376746719.

It is a Cunningham number, because it is equal to 302927²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91764767323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14537293 + ... + 14543603.

It is an arithmetic number, because the mean of its divisors is an integer number (1380661632).

Almost surely, 2^91764767328 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 91764767328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132543516672).

91764767328 is an abundant number, since it is smaller than the sum of its proper divisors (173322266016).

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

91764767328 is a wasteful number, since it uses less digits than its factorization.

91764767328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6589 (or 6581 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 60.

The spelling of 91764767328 in words is "ninety-one billion, seven hundred sixty-four million, seven hundred sixty-seven thousand, three hundred twenty-eight".