15998989104 has 200 divisors, whose sum is σ = 53469334688. Its totient is φ = 4523765760.

The previous prime is 15998989087. The next prime is 15998989169. The reversal of 15998989104 is 40198989951.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 870894 + ... + 889074.

Almost surely, 2^15998989104 is an apocalyptic number.

15998989104 is a gapful number since it is divisible by the number (14) 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 15998989104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26734667344).

15998989104 is an abundant number, since it is smaller than the sum of its proper divisors (37470345584).

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

15998989104 is a wasteful number, since it uses less digits than its factorization.

15998989104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18305 (or 18290 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 63.

The spelling of 15998989104 in words is "fifteen billion, nine hundred ninety-eight million, nine hundred eighty-nine thousand, one hundred four".