90000900008 has 32 divisors (see below), whose sum is σ = 170128450560. Its totient is φ = 44633514240.

The previous prime is 90000899999. The next prime is 90000900131. The reversal of 90000900008 is 80000900009.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90000900008.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4331003 + ... + 4351733.

It is an arithmetic number, because the mean of its divisors is an integer number (5316514080).

Almost surely, 2^90000900008 is an apocalyptic number.

It is an amenable number.

90000900008 is a deficient number, since it is larger than the sum of its proper divisors (80127550552).

90000900008 is a wasteful number, since it uses less digits than its factorization.

90000900008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25137 (or 25133 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

Subtracting from 90000900008 its reverse (80000900009), we obtain a palindrome (9999999999).

The spelling of 90000900008 in words is "ninety billion, nine hundred thousand, eight".