91507375872 has 432 divisors, whose sum is σ = 306859408128. Its totient is φ = 25918341120.

The previous prime is 91507375867. The next prime is 91507375879. The reversal of 91507375872 is 27857370519.

It is a happy number.

91507375872 is a `hidden beast` number, since 9 + 1 + 50 + 7 + 3 + 7 + 587 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91507375879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70227573 + ... + 70228875.

It is an arithmetic number, because the mean of its divisors is an integer number (710322704).

Almost surely, 2^91507375872 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 91507375872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153429704064).

91507375872 is an abundant number, since it is smaller than the sum of its proper divisors (215352032256).

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

91507375872 is a wasteful number, since it uses less digits than its factorization.

91507375872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 54.

The spelling of 91507375872 in words is "ninety-one billion, five hundred seven million, three hundred seventy-five thousand, eight hundred seventy-two".