12686916889 has 4 divisors (see below), whose sum is σ = 12692992180. Its totient is φ = 12680841600.

The previous prime is 12686916881. The next prime is 12686916901. The reversal of 12686916889 is 98861968621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98861968621 = 13 ⋅7604766817.

It can be written as a sum of positive squares in 2 ways, for example, as 8998419600 + 3688497289 = 94860^2 + 60733^2 .

It is a cyclic number.

It is not a de Polignac number, because 12686916889 - 2³ = 12686916881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12686916889.

It is not an unprimeable number, because it can be changed into a prime (12686916881) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3034512 + ... + 3038689.

It is an arithmetic number, because the mean of its divisors is an integer number (3173248045).

Almost surely, 2^12686916889 is an apocalyptic number.

It is an amenable number.

12686916889 is a deficient number, since it is larger than the sum of its proper divisors (6075291).

12686916889 is an equidigital number, since it uses as much as digits as its factorization.

12686916889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075290.

The product of its digits is 17915904, while the sum is 64.

The spelling of 12686916889 in words is "twelve billion, six hundred eighty-six million, nine hundred sixteen thousand, eight hundred eighty-nine".