13256948689 has 2 divisors, whose sum is σ = 13256948690. Its totient is φ = 13256948688.

The previous prime is 13256948623. The next prime is 13256948729. The reversal of 13256948689 is 98684965231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10320934464 + 2936014225 = 101592^2 + 54185^2 .

It is an emirp because it is prime and its reverse (98684965231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13256948689 - 2¹³ = 13256940497 is a prime.

It is not a weakly prime, because it can be changed into another prime (13256948389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6628474344 + 6628474345.

It is an arithmetic number, because the mean of its divisors is an integer number (6628474345).

Almost surely, 2^13256948689 is an apocalyptic number.

It is an amenable number.

13256948689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13256948689 is an equidigital number, since it uses as much as digits as its factorization.

13256948689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 61.

The spelling of 13256948689 in words is "thirteen billion, two hundred fifty-six million, nine hundred forty-eight thousand, six hundred eighty-nine".