900090090008 has 64 divisors (see below), whose sum is σ = 1783486320000. Its totient is φ = 424682134272.

The previous prime is 900090089959. The next prime is 900090090017. The reversal of 900090090008 is 800090090009.

It is a self number, because there is not a number n which added to its sum of digits gives 900090090008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79276460 + ... + 79287812.

It is an arithmetic number, because the mean of its divisors is an integer number (27866973750).

Almost surely, 2^900090090008 is an apocalyptic number.

It is an amenable number.

900090090008 is a deficient number, since it is larger than the sum of its proper divisors (883396229992).

900090090008 is a wasteful number, since it uses less digits than its factorization.

900090090008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13384 (or 13380 counting only the distinct ones).

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

Subtracting from 900090090008 its reverse (800090090009), we obtain a palindrome (99999999999).

The spelling of 900090090008 in words is "nine hundred billion, ninety million, ninety thousand, eight".