91808288832 has 56 divisors (see below), whose sum is σ = 261594778816. Its totient is φ = 28248703488.

The previous prime is 91808288773. The next prime is 91808288851. The reversal of 91808288832 is 23888280819.

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, 18388588 + ... + 18393579.

It is an arithmetic number, because the mean of its divisors is an integer number (4671335336).

Almost surely, 2^91808288832 is an apocalyptic number.

It is an amenable number.

91808288832 is an abundant number, since it is smaller than the sum of its proper divisors (169786489984).

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

91808288832 is a wasteful number, since it uses less digits than its factorization.

91808288832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36782195 (or 36782185 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 57.

The spelling of 91808288832 in words is "ninety-one billion, eight hundred eight million, two hundred eighty-eight thousand, eight hundred thirty-two".