13776078857789 has 2 divisors, whose sum is σ = 13776078857790. Its totient is φ = 13776078857788.

The previous prime is 13776078857743. The next prime is 13776078857809. The reversal of 13776078857789 is 98775887067731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11366573959225 + 2409504898564 = 3371435^2 + 1552258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13776078857789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13776078859789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6888039428894 + 6888039428895.

It is an arithmetic number, because the mean of its divisors is an integer number (6888039428895).

Almost surely, 2^{13776078857789} is an apocalyptic number.

It is an amenable number.

13776078857789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13776078857789 is an equidigital number, since it uses as much as digits as its factorization.

13776078857789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6970199040, while the sum is 83.

The spelling of 13776078857789 in words is "thirteen trillion, seven hundred seventy-six billion, seventy-eight million, eight hundred fifty-seven thousand, seven hundred eighty-nine".