15971565960 has 512 divisors, whose sum is σ = 64928563200. Its totient is φ = 3408998400.

The previous prime is 15971565931. The next prime is 15971565971. The reversal of 15971565960 is 6956517951.

15971565960 is a `hidden beast` number, since 1 + 5 + 9 + 71 + 565 + 9 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 15971565897 and 15971565906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19406109 + ... + 19406931.

It is an arithmetic number, because the mean of its divisors is an integer number (126813600).

Almost surely, 2^15971565960 is an apocalyptic number.

15971565960 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 15971565960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32464281600).

15971565960 is an abundant number, since it is smaller than the sum of its proper divisors (48956997240).

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

15971565960 is a wasteful number, since it uses less digits than its factorization.

15971565960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 2551500, while the sum is 54.

The spelling of 15971565960 in words is "fifteen billion, nine hundred seventy-one million, five hundred sixty-five thousand, nine hundred sixty".