13778716979169 has 24 divisors (see below), whose sum is σ = 20067732723584. Its totient is φ = 9109794600000.

The previous prime is 13778716979129. The next prime is 13778716979173. The reversal of 13778716979169 is 96197961787731.

13778716979169 is a `hidden beast` number, since 1 + 377 + 8 + 7 + 16 + 9 + 79 + 169 = 666.

It is not a de Polignac number, because 13778716979169 - 2¹¹ = 13778716977121 is a prime.

It is a super-2 number, since 2×13778716979169² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13778716979129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7618237 + ... + 9251754.

Almost surely, 2^{13778716979169} is an apocalyptic number.

It is an amenable number.

13778716979169 is a deficient number, since it is larger than the sum of its proper divisors (6289015744415).

13778716979169 is a wasteful number, since it uses less digits than its factorization.

13778716979169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16870749 (or 16870746 counting only the distinct ones).

The product of its digits is 1512284256, while the sum is 81.

The spelling of 13778716979169 in words is "thirteen trillion, seven hundred seventy-eight billion, seven hundred sixteen million, nine hundred seventy-nine thousand, one hundred sixty-nine".