12636869197 has 4 divisors (see below), whose sum is σ = 12930749920. Its totient is φ = 12342988476.

The previous prime is 12636869173. The next prime is 12636869207. The reversal of 12636869197 is 79196863621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12636869197 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 (12636869117) 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, 146940297 + ... + 146940382.

It is an arithmetic number, because the mean of its divisors is an integer number (3232687480).

Almost surely, 2^12636869197 is an apocalyptic number.

It is an amenable number.

12636869197 is a deficient number, since it is larger than the sum of its proper divisors (293880723).

12636869197 is an equidigital number, since it uses as much as digits as its factorization.

12636869197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293880722.

The product of its digits is 5878656, while the sum is 58.

The spelling of 12636869197 in words is "twelve billion, six hundred thirty-six million, eight hundred sixty-nine thousand, one hundred ninety-seven".