12608794661 has 2 divisors, whose sum is σ = 12608794662. Its totient is φ = 12608794660.

The previous prime is 12608794619. The next prime is 12608794663. The reversal of 12608794661 is 16649780621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6776417761 + 5832376900 = 82319^2 + 76370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12608794661 is a prime.

It is a Sophie Germain prime.

Together with 12608794663, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12608794663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6304397330 + 6304397331.

It is an arithmetic number, because the mean of its divisors is an integer number (6304397331).

Almost surely, 2^12608794661 is an apocalyptic number.

It is an amenable number.

12608794661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12608794661 is an equidigital number, since it uses as much as digits as its factorization.

12608794661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 12608794661 in words is "twelve billion, six hundred eight million, seven hundred ninety-four thousand, six hundred sixty-one".