15964970668873 has 2 divisors, whose sum is σ = 15964970668874. Its totient is φ = 15964970668872.

The previous prime is 15964970668817. The next prime is 15964970668897. The reversal of 15964970668873 is 37886607946951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15964204043529 + 766625344 = 3995523^2 + 27688^2 .

It is a cyclic number.

It is not a de Polignac number, because 15964970668873 - 2⁴¹ = 13765947413321 is a prime.

It is a super-2 number, since 2×15964970668873² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15964970668793 and 15964970668802.

It is not a weakly prime, because it can be changed into another prime (15964970668813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7982485334436 + 7982485334437.

It is an arithmetic number, because the mean of its divisors is an integer number (7982485334437).

Almost surely, 2^{15964970668873} is an apocalyptic number.

It is an amenable number.

15964970668873 is a deficient number, since it is larger than the sum of its proper divisors (1).

15964970668873 is an equidigital number, since it uses as much as digits as its factorization.

15964970668873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3292047360, while the sum is 79.

The spelling of 15964970668873 in words is "fifteen trillion, nine hundred sixty-four billion, nine hundred seventy million, six hundred sixty-eight thousand, eight hundred seventy-three".