12864665447 has 2 divisors, whose sum is σ = 12864665448. Its totient is φ = 12864665446.

The previous prime is 12864665419. The next prime is 12864665453. The reversal of 12864665447 is 74456646821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12864665447 - 2²⁸ = 12596229991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12864665347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6432332723 + 6432332724.

It is an arithmetic number, because the mean of its divisors is an integer number (6432332724).

Almost surely, 2^12864665447 is an apocalyptic number.

12864665447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12864665447 is an equidigital number, since it uses as much as digits as its factorization.

12864665447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 53.

The spelling of 12864665447 in words is "twelve billion, eight hundred sixty-four million, six hundred sixty-five thousand, four hundred forty-seven".