91556428392 has 96 divisors (see below), whose sum is σ = 291315941280. Its totient is φ = 25610186880.

The previous prime is 91556428387. The next prime is 91556428423. The reversal of 91556428392 is 29382465519.

91556428392 is a `hidden beast` number, since 9 + 1 + 556 + 4 + 2 + 83 + 9 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4435918 + ... + 4456509.

It is an arithmetic number, because the mean of its divisors is an integer number (3034541055).

Almost surely, 2^91556428392 is an apocalyptic number.

It is an amenable number.

91556428392 is an abundant number, since it is smaller than the sum of its proper divisors (199759512888).

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

91556428392 is a wasteful number, since it uses less digits than its factorization.

91556428392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892463 (or 8892456 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 91556428392 in words is "ninety-one billion, five hundred fifty-six million, four hundred twenty-eight thousand, three hundred ninety-two".