91872393168 has 40 divisors (see below), whose sum is σ = 237354747808. Its totient is φ = 30621843072.

The previous prime is 91872393139. The next prime is 91872393181. The reversal of 91872393168 is 86139327819.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 653430 + ... + 781482.

Almost surely, 2^91872393168 is an apocalyptic number.

It is an amenable number.

91872393168 is an abundant number, since it is smaller than the sum of its proper divisors (145482354640).

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

91872393168 is a wasteful number, since it uses less digits than its factorization.

91872393168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143011 (or 143005 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The spelling of 91872393168 in words is "ninety-one billion, eight hundred seventy-two million, three hundred ninety-three thousand, one hundred sixty-eight".