91290044328 has 64 divisors (see below), whose sum is σ = 260911320960. Its totient is φ = 26074607616.

The previous prime is 91290044311. The next prime is 91290044347. The reversal of 91290044328 is 82344009219.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 91290044328.

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 15 ways as a sum of consecutive naturals, for example, 456000 + ... + 624912.

It is an arithmetic number, because the mean of its divisors is an integer number (4076739390).

Almost surely, 2^91290044328 is an apocalyptic number.

It is an amenable number.

91290044328 is an abundant number, since it is smaller than the sum of its proper divisors (169621276632).

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

91290044328 is a wasteful number, since it uses less digits than its factorization.

91290044328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172146 (or 172142 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 91290044328 in words is "ninety-one billion, two hundred ninety million, forty-four thousand, three hundred twenty-eight".