12669256289 has 2 divisors, whose sum is σ = 12669256290. Its totient is φ = 12669256288.

The previous prime is 12669256261. The next prime is 12669256309. The reversal of 12669256289 is 98265296621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12192576400 + 476679889 = 110420^2 + 21833^2 .

It is an emirp because it is prime and its reverse (98265296621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12669256289 - 2¹⁶ = 12669190753 is a prime.

It is not a weakly prime, because it can be changed into another prime (12669256219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6334628144 + 6334628145.

It is an arithmetic number, because the mean of its divisors is an integer number (6334628145).

Almost surely, 2^12669256289 is an apocalyptic number.

It is an amenable number.

12669256289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12669256289 is an equidigital number, since it uses as much as digits as its factorization.

12669256289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 56.

The spelling of 12669256289 in words is "twelve billion, six hundred sixty-nine million, two hundred fifty-six thousand, two hundred eighty-nine".