12686673161 has 4 divisors (see below), whose sum is σ = 12687002772. Its totient is φ = 12686343552.

The previous prime is 12686673157. The next prime is 12686673169. The reversal of 12686673161 is 16137668621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16137668621 = 223 ⋅72366227.

It can be written as a sum of positive squares in 2 ways, for example, as 11042857225 + 1643815936 = 105085^2 + 40544^2 .

It is a cyclic number.

It is not a de Polignac number, because 12686673161 - 2² = 12686673157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12686673169) 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, 98060 + ... + 187053.

It is an arithmetic number, because the mean of its divisors is an integer number (3171750693).

Almost surely, 2^12686673161 is an apocalyptic number.

It is an amenable number.

12686673161 is a deficient number, since it is larger than the sum of its proper divisors (329611).

12686673161 is an equidigital number, since it uses as much as digits as its factorization.

12686673161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329610.

The product of its digits is 435456, while the sum is 47.

The spelling of 12686673161 in words is "twelve billion, six hundred eighty-six million, six hundred seventy-three thousand, one hundred sixty-one".