13878968579369 has 2 divisors, whose sum is σ = 13878968579370. Its totient is φ = 13878968579368.

The previous prime is 13878968579341. The next prime is 13878968579459. The reversal of 13878968579369 is 96397586987831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13078435753744 + 800532825625 = 3616412^2 + 894725^2 .

It is an emirp because it is prime and its reverse (96397586987831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13878968579369 is a prime.

It is a super-2 number, since 2×13878968579369² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13878968579669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6939484289684 + 6939484289685.

It is an arithmetic number, because the mean of its divisors is an integer number (6939484289685).

Almost surely, 2^{13878968579369} is an apocalyptic number.

It is an amenable number.

13878968579369 is a deficient number, since it is larger than the sum of its proper divisors (1).

13878968579369 is an equidigital number, since it uses as much as digits as its factorization.

13878968579369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29628426240, while the sum is 89.

The spelling of 13878968579369 in words is "thirteen trillion, eight hundred seventy-eight billion, nine hundred sixty-eight million, five hundred seventy-nine thousand, three hundred sixty-nine".