13256660603009 has 2 divisors, whose sum is σ = 13256660603010. Its totient is φ = 13256660603008.

The previous prime is 13256660602951. The next prime is 13256660603051. The reversal of 13256660603009 is 90030606665231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10446813015409 + 2809847587600 = 3232153^2 + 1676260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13256660603009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13256660603099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6628330301504 + 6628330301505.

It is an arithmetic number, because the mean of its divisors is an integer number (6628330301505).

Almost surely, 2^{13256660603009} is an apocalyptic number.

It is an amenable number.

13256660603009 is a deficient number, since it is larger than the sum of its proper divisors (1).

13256660603009 is an equidigital number, since it uses as much as digits as its factorization.

13256660603009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 47.

The spelling of 13256660603009 in words is "thirteen trillion, two hundred fifty-six billion, six hundred sixty million, six hundred three thousand, nine".