15978332160 has 720 divisors, whose sum is σ = 66991167936. Its totient is φ = 3567255552.

The previous prime is 15978332137. The next prime is 15978332177. The reversal of 15978332160 is 6123387951.

15978332160 is a `hidden beast` number, since 1 + 597 + 8 + 33 + 21 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 371589099 + ... + 371589141.

Almost surely, 2^15978332160 is an apocalyptic number.

15978332160 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 15978332160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33495583968).

15978332160 is an abundant number, since it is smaller than the sum of its proper divisors (51012835776).

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

15978332160 is an frugal number, since it uses more digits than its factorization.

15978332160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 15978332160 in words is "fifteen billion, nine hundred seventy-eight million, three hundred thirty-two thousand, one hundred sixty".