90904481646 has 32 divisors (see below), whose sum is σ = 198400727808. Its totient is φ = 27537968640.

The previous prime is 90904481627. The next prime is 90904481663. The reversal of 90904481646 is 64618440909.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 12490 + ... + 426573.

It is an arithmetic number, because the mean of its divisors is an integer number (6200022744).

Almost surely, 2^90904481646 is an apocalyptic number.

90904481646 is an abundant number, since it is smaller than the sum of its proper divisors (107496246162).

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

90904481646 is a wasteful number, since it uses less digits than its factorization.

90904481646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442216.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 90904481646 in words is "ninety billion, nine hundred four million, four hundred eighty-one thousand, six hundred forty-six".