12639026497 has 2 divisors, whose sum is σ = 12639026498. Its totient is φ = 12639026496.

The previous prime is 12639026489. The next prime is 12639026503. The reversal of 12639026497 is 79462093621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10967116176 + 1671910321 = 104724^2 + 40889^2 .

It is a cyclic number.

It is not a de Polignac number, because 12639026497 - 2³ = 12639026489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12639026497.

It is not a weakly prime, because it can be changed into another prime (12639096497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319513248 + 6319513249.

It is an arithmetic number, because the mean of its divisors is an integer number (6319513249).

Almost surely, 2^12639026497 is an apocalyptic number.

It is an amenable number.

12639026497 is a deficient number, since it is larger than the sum of its proper divisors (1).

12639026497 is an equidigital number, since it uses as much as digits as its factorization.

12639026497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 12639026497 in words is "twelve billion, six hundred thirty-nine million, twenty-six thousand, four hundred ninety-seven".