91528372672 has 84 divisors (see below), whose sum is σ = 208319540688. Its totient is φ = 39794867200.

The previous prime is 91528372667. The next prime is 91528372721. The reversal of 91528372672 is 27627382519.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78829 + ... + 435052.

It is an arithmetic number, because the mean of its divisors is an integer number (2479994532).

Almost surely, 2^91528372672 is an apocalyptic number.

91528372672 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

91528372672 is an abundant number, since it is smaller than the sum of its proper divisors (116791168016).

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

91528372672 is a wasteful number, since it uses less digits than its factorization.

91528372672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513938 (or 513917 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The spelling of 91528372672 in words is "ninety-one billion, five hundred twenty-eight million, three hundred seventy-two thousand, six hundred seventy-two".