12626251397 has 2 divisors, whose sum is σ = 12626251398. Its totient is φ = 12626251396.

The previous prime is 12626251387. The next prime is 12626251433. The reversal of 12626251397 is 79315262621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12604777441 + 21473956 = 112271^2 + 4634^2 .

It is a cyclic number.

It is not a de Polignac number, because 12626251397 - 2²⁴ = 12609474181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12626251387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6313125698 + 6313125699.

It is an arithmetic number, because the mean of its divisors is an integer number (6313125699).

Almost surely, 2^12626251397 is an apocalyptic number.

It is an amenable number.

12626251397 is a deficient number, since it is larger than the sum of its proper divisors (1).

12626251397 is an equidigital number, since it uses as much as digits as its factorization.

12626251397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The spelling of 12626251397 in words is "twelve billion, six hundred twenty-six million, two hundred fifty-one thousand, three hundred ninety-seven".