15979985280 has 384 divisors, whose sum is σ = 63355219200. Its totient is φ = 3635712000.

The previous prime is 15979985251. The next prime is 15979985293. The reversal of 15979985280 is 8258997951.

15979985280 is a `hidden beast` number, since 15 + 9 + 7 + 9 + 98 + 528 + 0 = 666.

15979985280 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 (384).

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

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 10119531 + ... + 10121109.

It is an arithmetic number, because the mean of its divisors is an integer number (164987550).

Almost surely, 2^15979985280 is an apocalyptic number.

15979985280 is a gapful number since it is divisible by the number (10) 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 15979985280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31677609600).

15979985280 is an abundant number, since it is smaller than the sum of its proper divisors (47375233920).

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

15979985280 is a wasteful number, since it uses less digits than its factorization.

15979985280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 63.

The spelling of 15979985280 in words is "fifteen billion, nine hundred seventy-nine million, nine hundred eighty-five thousand, two hundred eighty".