12669855257 has 2 divisors, whose sum is σ = 12669855258. Its totient is φ = 12669855256.

The previous prime is 12669855241. The next prime is 12669855281. The reversal of 12669855257 is 75255896621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6390243721 + 6279611536 = 79939^2 + 79244^2 .

It is a cyclic number.

It is not a de Polignac number, because 12669855257 - 2⁴ = 12669855241 is a prime.

It is not a weakly prime, because it can be changed into another prime (12669845257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6334927628 + 6334927629.

It is an arithmetic number, because the mean of its divisors is an integer number (6334927629).

Almost surely, 2^12669855257 is an apocalyptic number.

It is an amenable number.

12669855257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12669855257 is an equidigital number, since it uses as much as digits as its factorization.

12669855257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 56.

The spelling of 12669855257 in words is "twelve billion, six hundred sixty-nine million, eight hundred fifty-five thousand, two hundred fifty-seven".