90881605290 has 64 divisors (see below), whose sum is σ = 252995825664. Its totient is φ = 20462891328.

The previous prime is 90881605261. The next prime is 90881605301. The reversal of 90881605290 is 9250618809.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3215554 + ... + 3243693.

It is an arithmetic number, because the mean of its divisors is an integer number (3953059776).

Almost surely, 2^90881605290 is an apocalyptic number.

90881605290 is an abundant number, since it is smaller than the sum of its proper divisors (162114220374).

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

90881605290 is a wasteful number, since it uses less digits than its factorization.

90881605290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6459331.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 90881605290 in words is "ninety billion, eight hundred eighty-one million, six hundred five thousand, two hundred ninety".