13564236449 has 2 divisors, whose sum is σ = 13564236450. Its totient is φ = 13564236448.

The previous prime is 13564236421. The next prime is 13564236457. The reversal of 13564236449 is 94463246531.

13564236449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13266432400 + 297804049 = 115180^2 + 17257^2 .

It is a cyclic number.

It is not a de Polignac number, because 13564236449 - 2¹⁶ = 13564170913 is a prime.

It is not a weakly prime, because it can be changed into another prime (13564236409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6782118224 + 6782118225.

It is an arithmetic number, because the mean of its divisors is an integer number (6782118225).

Almost surely, 2^13564236449 is an apocalyptic number.

It is an amenable number.

13564236449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13564236449 is an equidigital number, since it uses as much as digits as its factorization.

13564236449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 47.

The spelling of 13564236449 in words is "thirteen billion, five hundred sixty-four million, two hundred thirty-six thousand, four hundred forty-nine".