90879798912 has 128 divisors (see below), whose sum is σ = 276986304000. Its totient is φ = 25862016000.

The previous prime is 90879798883. The next prime is 90879798929. The reversal of 90879798912 is 21989797809.

It is a tau number, because it is divible by the number of its divisors (128).

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, 607339 + ... + 742037.

It is an arithmetic number, because the mean of its divisors is an integer number (2163955500).

Almost surely, 2^90879798912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90879798912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138493152000).

90879798912 is an abundant number, since it is smaller than the sum of its proper divisors (186106505088).

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

90879798912 is a wasteful number, since it uses less digits than its factorization.

90879798912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134974 (or 134962 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 69.

The spelling of 90879798912 in words is "ninety billion, eight hundred seventy-nine million, seven hundred ninety-eight thousand, nine hundred twelve".