12646656167 has 4 divisors (see below), whose sum is σ = 13390577136. Its totient is φ = 11902735200.

The previous prime is 12646656161. The next prime is 12646656199. The reversal of 12646656167 is 76165664621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76165664621 = 17 ⋅4480333213.

It is a cyclic number.

It is not a de Polignac number, because 12646656167 - 2²⁰ = 12645607591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646656161) 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, 371960459 + ... + 371960492.

It is an arithmetic number, because the mean of its divisors is an integer number (3347644284).

Almost surely, 2^12646656167 is an apocalyptic number.

12646656167 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12646656167 is a deficient number, since it is larger than the sum of its proper divisors (743920969).

12646656167 is an equidigital number, since it uses as much as digits as its factorization.

12646656167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743920968.

The product of its digits is 2177280, while the sum is 50.

The spelling of 12646656167 in words is "twelve billion, six hundred forty-six million, six hundred fifty-six thousand, one hundred sixty-seven".