15968659116865 has 48 divisors (see below), whose sum is σ = 24007599761040. Its totient is φ = 10106806510080.

The previous prime is 15968659116863. The next prime is 15968659116913. The reversal of 15968659116865 is 56861195686951.

It can be written as a sum of positive squares in 8 ways, for example, as 296276641969 + 15672382474896 = 544313^2 + 3958836^2 .

It is not a de Polignac number, because 15968659116865 - 2¹ = 15968659116863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15968659116791 and 15968659116800.

It is not an unprimeable number, because it can be changed into a prime (15968659116863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39896835 + ... + 40295095.

It is an arithmetic number, because the mean of its divisors is an integer number (500158328355).

Almost surely, 2^{15968659116865} is an apocalyptic number.

It is an amenable number.

15968659116865 is a deficient number, since it is larger than the sum of its proper divisors (8038940644175).

15968659116865 is a wasteful number, since it uses less digits than its factorization.

15968659116865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410882 (or 410875 counting only the distinct ones).

The product of its digits is 839808000, while the sum is 76.

The spelling of 15968659116865 in words is "fifteen trillion, nine hundred sixty-eight billion, six hundred fifty-nine million, one hundred sixteen thousand, eight hundred sixty-five".