12638003617 has 2 divisors, whose sum is σ = 12638003618. Its totient is φ = 12638003616.

The previous prime is 12638003611. The next prime is 12638003627. The reversal of 12638003617 is 71630083621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10694869056 + 1943134561 = 103416^2 + 44081^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12638003617 is a prime.

It is not a weakly prime, because it can be changed into another prime (12638003611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319001808 + 6319001809.

It is an arithmetic number, because the mean of its divisors is an integer number (6319001809).

Almost surely, 2^12638003617 is an apocalyptic number.

It is an amenable number.

12638003617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638003617 is an equidigital number, since it uses as much as digits as its factorization.

12638003617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 12638003617 in words is "twelve billion, six hundred thirty-eight million, three thousand, six hundred seventeen".