91100072332 has 6 divisors (see below), whose sum is σ = 159425126588. Its totient is φ = 45550036164.

The previous prime is 91100072321. The next prime is 91100072347. The reversal of 91100072332 is 23327000119.

It is a self number, because there is not a number n which added to its sum of digits gives 91100072332.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11387509038 + ... + 11387509045.

Almost surely, 2^91100072332 is an apocalyptic number.

It is an amenable number.

91100072332 is a deficient number, since it is larger than the sum of its proper divisors (68325054256).

91100072332 is a wasteful number, since it uses less digits than its factorization.

91100072332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22775018087 (or 22775018085 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The spelling of 91100072332 in words is "ninety-one billion, one hundred million, seventy-two thousand, three hundred thirty-two".