15900899328 has 144 divisors (see below), whose sum is σ = 46046145600. Its totient is φ = 5286297600.

The previous prime is 15900899321. The next prime is 15900899363. The reversal of 15900899328 is 82399800951.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15900899321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8828028 + ... + 8829828.

It is an arithmetic number, because the mean of its divisors is an integer number (319764900).

Almost surely, 2^15900899328 is an apocalyptic number.

15900899328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15900899328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23023072800).

15900899328 is an abundant number, since it is smaller than the sum of its proper divisors (30145246272).

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

15900899328 is a wasteful number, since it uses less digits than its factorization.

15900899328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 15900899328 in words is "fifteen billion, nine hundred million, eight hundred ninety-nine thousand, three hundred twenty-eight".