12686206879 has 4 divisors (see below), whose sum is σ = 12724534120. Its totient is φ = 12647879640.

The previous prime is 12686206877. The next prime is 12686206901. The reversal of 12686206879 is 97860268621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97860268621 = 353 ⋅277224557.

It is a cyclic number.

It is not a de Polignac number, because 12686206879 - 2¹ = 12686206877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12686206877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19163124 + ... + 19163785.

It is an arithmetic number, because the mean of its divisors is an integer number (3181133530).

Almost surely, 2^12686206879 is an apocalyptic number.

12686206879 is a deficient number, since it is larger than the sum of its proper divisors (38327241).

12686206879 is an equidigital number, since it uses as much as digits as its factorization.

12686206879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38327240.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 12686206879 in words is "twelve billion, six hundred eighty-six million, two hundred six thousand, eight hundred seventy-nine".