90900000000908 has 96 divisors (see below), whose sum is σ = 190947308912640. Its totient is φ = 37038544139520.

The previous prime is 90900000000893. The next prime is 90900000000919. The reversal of 90900000000908 is 80900000000909.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145872638 + ... + 146494458.

It is an arithmetic number, because the mean of its divisors is an integer number (1989034467840).

Almost surely, 2^{90900000000908} 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 90900000000908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95473654456320).

90900000000908 is an abundant number, since it is smaller than the sum of its proper divisors (100047308911732).

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

90900000000908 is a wasteful number, since it uses less digits than its factorization.

90900000000908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624615 (or 624613 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

Subtracting from 90900000000908 its reverse (80900000000909), we obtain a palindrome (9999999999999).

The spelling of 90900000000908 in words is "ninety trillion, nine hundred billion, nine hundred eight", and thus it is an aban number.