15318999090 has 48 divisors (see below), whose sum is σ = 41925686400. Its totient is φ = 3870062496.

The previous prime is 15318999089. The next prime is 15318999133. The reversal of 15318999090 is 9099981351.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4477530 + ... + 4480949.

It is an arithmetic number, because the mean of its divisors is an integer number (873451800).

Almost surely, 2^15318999090 is an apocalyptic number.

15318999090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15318999090 is an abundant number, since it is smaller than the sum of its proper divisors (26606687310).

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

15318999090 is a wasteful number, since it uses less digits than its factorization.

15318999090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8958511 (or 8958508 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 54.

The spelling of 15318999090 in words is "fifteen billion, three hundred eighteen million, nine hundred ninety-nine thousand, ninety".