15987398336 has 112 divisors (see below), whose sum is σ = 39189111360. Its totient is φ = 6301532160.

The previous prime is 15987398309. The next prime is 15987398351. The reversal of 15987398336 is 63389378951.

15987398336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1631660 + ... + 1641428.

It is an arithmetic number, because the mean of its divisors is an integer number (349902780).

Almost surely, 2^15987398336 is an apocalyptic number.

15987398336 is a gapful number since it is divisible by the number (16) 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 15987398336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19594555680).

15987398336 is an abundant number, since it is smaller than the sum of its proper divisors (23201713024).

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

15987398336 is a wasteful number, since it uses less digits than its factorization.

15987398336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10082 (or 10072 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 62.

The spelling of 15987398336 in words is "fifteen billion, nine hundred eighty-seven million, three hundred ninety-eight thousand, three hundred thirty-six".