12766764243637 has 2 divisors, whose sum is σ = 12766764243638. Its totient is φ = 12766764243636.

The previous prime is 12766764243619. The next prime is 12766764243749. The reversal of 12766764243637 is 73634246766721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9996783209361 + 2769981034276 = 3161769^2 + 1664326^2 .

It is an emirp because it is prime and its reverse (73634246766721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12766764243637 - 2²⁷ = 12766630025909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12766704243637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6383382121818 + 6383382121819.

It is an arithmetic number, because the mean of its divisors is an integer number (6383382121819).

Almost surely, 2^{12766764243637} is an apocalyptic number.

It is an amenable number.

12766764243637 is a deficient number, since it is larger than the sum of its proper divisors (1).

12766764243637 is an equidigital number, since it uses as much as digits as its factorization.

12766764243637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256048128, while the sum is 64.

The spelling of 12766764243637 in words is "twelve trillion, seven hundred sixty-six billion, seven hundred sixty-four million, two hundred forty-three thousand, six hundred thirty-seven".