91871802232 has 32 divisors (see below), whose sum is σ = 205427635200. Its totient is φ = 37661732064.

The previous prime is 91871802229. The next prime is 91871802241. The reversal of 91871802232 is 23220817819.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35663232 + ... + 35665807.

It is an arithmetic number, because the mean of its divisors is an integer number (6419613600).

Almost surely, 2^91871802232 is an apocalyptic number.

91871802232 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

91871802232 is an abundant number, since it is smaller than the sum of its proper divisors (113555832968).

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

91871802232 is a wasteful number, since it uses less digits than its factorization.

91871802232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71329075 (or 71329071 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 91871802232 in words is "ninety-one billion, eight hundred seventy-one million, eight hundred two thousand, two hundred thirty-two".