90785478874 has 16 divisors (see below), whose sum is σ = 137328811200. Its totient is φ = 45010538784.

The previous prime is 90785478869. The next prime is 90785478911. The reversal of 90785478874 is 47887458709.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195684 + ... + 468895.

It is an arithmetic number, because the mean of its divisors is an integer number (8583050700).

Almost surely, 2^90785478874 is an apocalyptic number.

90785478874 is a deficient number, since it is larger than the sum of its proper divisors (46543332326).

90785478874 is a wasteful number, since it uses less digits than its factorization.

90785478874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665157.

The product of its (nonzero) digits is 126443520, while the sum is 67.

The spelling of 90785478874 in words is "ninety billion, seven hundred eighty-five million, four hundred seventy-eight thousand, eight hundred seventy-four".