15989974560 has 384 divisors, whose sum is σ = 64138314240. Its totient is φ = 3644669952.

The previous prime is 15989974541. The next prime is 15989974573. The reversal of 15989974560 is 6547998951.

15989974560 is a `hidden beast` number, since 1 + 5 + 98 + 9 + 97 + 456 + 0 = 666.

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 63 ways as a sum of consecutive naturals, for example, 18657652 + ... + 18658508.

It is an arithmetic number, because the mean of its divisors is an integer number (167026860).

Almost surely, 2^15989974560 is an apocalyptic number.

15989974560 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 15989974560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32069157120).

15989974560 is an abundant number, since it is smaller than the sum of its proper divisors (48148339680).

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

15989974560 is a wasteful number, since it uses less digits than its factorization.

15989974560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 63.

The spelling of 15989974560 in words is "fifteen billion, nine hundred eighty-nine million, nine hundred seventy-four thousand, five hundred sixty".