12797664137 has 2 divisors, whose sum is σ = 12797664138. Its totient is φ = 12797664136.

The previous prime is 12797664067. The next prime is 12797664211. The reversal of 12797664137 is 73146679721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12541536121 + 256128016 = 111989^2 + 16004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12797664137 is a prime.

It is not a weakly prime, because it can be changed into another prime (12797661137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6398832068 + 6398832069.

It is an arithmetic number, because the mean of its divisors is an integer number (6398832069).

Almost surely, 2^12797664137 is an apocalyptic number.

It is an amenable number.

12797664137 is a deficient number, since it is larger than the sum of its proper divisors (1).

12797664137 is an equidigital number, since it uses as much as digits as its factorization.

12797664137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 53.

The spelling of 12797664137 in words is "twelve billion, seven hundred ninety-seven million, six hundred sixty-four thousand, one hundred thirty-seven".