91327129344 has 432 divisors, whose sum is σ = 300630081024. Its totient is φ = 27649797120.

The previous prime is 91327129339. The next prime is 91327129351. The reversal of 91327129344 is 44392172319.

91327129344 is a `hidden beast` number, since 9 + 13 + 271 + 29 + 344 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a self number, because there is not a number n which added to its sum of digits gives 91327129344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82798297 + ... + 82799399.

Almost surely, 2^91327129344 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 91327129344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150315040512).

91327129344 is an abundant number, since it is smaller than the sum of its proper divisors (209302951680).

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

91327129344 is an equidigital number, since it uses as much as digits as its factorization.

91327129344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1119 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The spelling of 91327129344 in words is "ninety-one billion, three hundred twenty-seven million, one hundred twenty-nine thousand, three hundred forty-four".