90499178504 has 16 divisors (see below), whose sum is σ = 193926811200. Its totient is φ = 38785362192.

The previous prime is 90499178477. The next prime is 90499178543. The reversal of 90499178504 is 40587199409.

It is a Harshad number since it is a multiple of its sum of digits (56), and also a Moran number because the ratio is a prime number: 1616056759 = 90499178504 / (9 + 0 + 4 + 9 + 9 + 1 + 7 + 8 + 5 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 90499178504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808028324 + ... + 808028435.

It is an arithmetic number, because the mean of its divisors is an integer number (12120425700).

Almost surely, 2^90499178504 is an apocalyptic number.

It is an amenable number.

90499178504 is an abundant number, since it is smaller than the sum of its proper divisors (103427632696).

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

90499178504 is a wasteful number, since it uses less digits than its factorization.

90499178504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616056772 (or 1616056768 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 90499178504 in words is "ninety billion, four hundred ninety-nine million, one hundred seventy-eight thousand, five hundred four".