91801231032 has 32 divisors (see below), whose sum is σ = 262289232000. Its totient is φ = 26228923104.

The previous prime is 91801230877. The next prime is 91801231043. The reversal of 91801231032 is 23013210819.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273217782 + ... + 273218117.

It is an arithmetic number, because the mean of its divisors is an integer number (8196538500).

Almost surely, 2^91801231032 is an apocalyptic number.

It is an amenable number.

91801231032 is an abundant number, since it is smaller than the sum of its proper divisors (170488000968).

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

91801231032 is a wasteful number, since it uses less digits than its factorization.

91801231032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546435915 (or 546435911 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 91801231032 in words is "ninety-one billion, eight hundred one million, two hundred thirty-one thousand, thirty-two".