13878968579405 has 32 divisors (see below), whose sum is σ = 17546259868800. Its totient is φ = 10509842472192.

The previous prime is 13878968579369. The next prime is 13878968579459. The reversal of 13878968579405 is 50497586987831.

It is a cyclic number.

It is not a de Polignac number, because 13878968579405 - 2⁶ = 13878968579341 is a prime.

It is a super-2 number, since 2×13878968579405² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13878968579405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 637018922 + ... + 637040708.

It is an arithmetic number, because the mean of its divisors is an integer number (548320620900).

Almost surely, 2^{13878968579405} is an apocalyptic number.

It is an amenable number.

13878968579405 is a deficient number, since it is larger than the sum of its proper divisors (3667291289395).

13878968579405 is a wasteful number, since it uses less digits than its factorization.

13878968579405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27213.

The product of its (nonzero) digits is 3657830400, while the sum is 80.

The spelling of 13878968579405 in words is "thirteen trillion, eight hundred seventy-eight billion, nine hundred sixty-eight million, five hundred seventy-nine thousand, four hundred five".