15968649080817 has 12 divisors (see below), whose sum is σ = 23193261957684. Its totient is φ = 10586949665760.

The previous prime is 15968649080749. The next prime is 15968649080827. The reversal of 15968649080817 is 71808094686951.

15968649080817 is a `hidden beast` number, since 1 + 59 + 6 + 8 + 6 + 490 + 8 + 0 + 81 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2713923465201 + 13254725615616 = 1647399^2 + 3640704^2 .

It is not a de Polignac number, because 15968649080817 - 2⁷ = 15968649080689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15968649080827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4901363958 + ... + 4901367215.

It is an arithmetic number, because the mean of its divisors is an integer number (1932771829807).

Almost surely, 2^{15968649080817} is an apocalyptic number.

It is an amenable number.

15968649080817 is a deficient number, since it is larger than the sum of its proper divisors (7224612876867).

15968649080817 is a wasteful number, since it uses less digits than its factorization.

15968649080817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9802731360 (or 9802731357 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 72.

The spelling of 15968649080817 in words is "fifteen trillion, nine hundred sixty-eight billion, six hundred forty-nine million, eighty thousand, eight hundred seventeen".