90685493980 has 24 divisors (see below), whose sum is σ = 190448157312. Its totient is φ = 36272555712.

The previous prime is 90685493963. The next prime is 90685494001. The reversal of 90685493980 is 8939458609.

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 7 ways as a sum of consecutive naturals, for example, 413634 + ... + 593686.

It is an arithmetic number, because the mean of its divisors is an integer number (7935339888).

Almost surely, 2^90685493980 is an apocalyptic number.

It is an amenable number.

90685493980 is an abundant number, since it is smaller than the sum of its proper divisors (99762663332).

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

90685493980 is a wasteful number, since it uses less digits than its factorization.

90685493980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205245 (or 205243 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 90685493980 in words is "ninety billion, six hundred eighty-five million, four hundred ninety-three thousand, nine hundred eighty".