13298728332809 has 2 divisors, whose sum is σ = 13298728332810. Its totient is φ = 13298728332808.

The previous prime is 13298728332749. The next prime is 13298728332821. The reversal of 13298728332809 is 90823382789231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11359616382409 + 1939111950400 = 3370403^2 + 1392520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13298728332809 is a prime.

It is not a weakly prime, because it can be changed into another prime (13298728331809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6649364166404 + 6649364166405.

It is an arithmetic number, because the mean of its divisors is an integer number (6649364166405).

Almost surely, 2^{13298728332809} is an apocalyptic number.

It is an amenable number.

13298728332809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13298728332809 is an equidigital number, since it uses as much as digits as its factorization.

13298728332809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 13298728332809 in words is "thirteen trillion, two hundred ninety-eight billion, seven hundred twenty-eight million, three hundred thirty-two thousand, eight hundred nine".