13256451365449 has 2 divisors, whose sum is σ = 13256451365450. Its totient is φ = 13256451365448.

The previous prime is 13256451365441. The next prime is 13256451365459. The reversal of 13256451365449 is 94456315465231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12912272023225 + 344179342224 = 3593365^2 + 586668^2 .

It is a cyclic number.

It is not a de Polignac number, because 13256451365449 - 2³ = 13256451365441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13256451365393 and 13256451365402.

It is not a weakly prime, because it can be changed into another prime (13256451365441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6628225682724 + 6628225682725.

It is an arithmetic number, because the mean of its divisors is an integer number (6628225682725).

Almost surely, 2^{13256451365449} is an apocalyptic number.

It is an amenable number.

13256451365449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13256451365449 is an equidigital number, since it uses as much as digits as its factorization.

13256451365449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656000, while the sum is 58.

The spelling of 13256451365449 in words is "thirteen trillion, two hundred fifty-six billion, four hundred fifty-one million, three hundred sixty-five thousand, four hundred forty-nine".