12766352178991 has 2 divisors, whose sum is σ = 12766352178992. Its totient is φ = 12766352178990.

The previous prime is 12766352178953. The next prime is 12766352179051. The reversal of 12766352178991 is 19987125366721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12766352178991 - 2⁷ = 12766352178863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12766352178911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6383176089495 + 6383176089496.

It is an arithmetic number, because the mean of its divisors is an integer number (6383176089496).

Almost surely, 2^{12766352178991} is an apocalyptic number.

12766352178991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12766352178991 is an equidigital number, since it uses as much as digits as its factorization.

12766352178991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68584320, while the sum is 67.

The spelling of 12766352178991 in words is "twelve trillion, seven hundred sixty-six billion, three hundred fifty-two million, one hundred seventy-eight thousand, nine hundred ninety-one".