13878855862769 has 2 divisors, whose sum is σ = 13878855862770. Its totient is φ = 13878855862768.

The previous prime is 13878855862757. The next prime is 13878855862889. The reversal of 13878855862769 is 96726855887831.

13878855862769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13513622983744 + 365232879025 = 3676088^2 + 604345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13878855862769 is a prime.

It is a super-2 number, since 2×13878855862769² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13878855867769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6939427931384 + 6939427931385.

It is an arithmetic number, because the mean of its divisors is an integer number (6939427931385).

Almost surely, 2^{13878855862769} is an apocalyptic number.

It is an amenable number.

13878855862769 is a deficient number, since it is larger than the sum of its proper divisors (1).

13878855862769 is an equidigital number, since it uses as much as digits as its factorization.

13878855862769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9754214400, while the sum is 83.

The spelling of 13878855862769 in words is "thirteen trillion, eight hundred seventy-eight billion, eight hundred fifty-five million, eight hundred sixty-two thousand, seven hundred sixty-nine".