13077775817 has 2 divisors, whose sum is σ = 13077775818. Its totient is φ = 13077775816.

The previous prime is 13077775783. The next prime is 13077775819. The reversal of 13077775817 is 71857777031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13020863881 + 56911936 = 114109^2 + 7544^2 .

It is a cyclic number.

It is not a de Polignac number, because 13077775817 - 2¹⁴ = 13077759433 is a prime.

Together with 13077775819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13077775819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6538887908 + 6538887909.

It is an arithmetic number, because the mean of its divisors is an integer number (6538887909).

Almost surely, 2^13077775817 is an apocalyptic number.

It is an amenable number.

13077775817 is a deficient number, since it is larger than the sum of its proper divisors (1).

13077775817 is an equidigital number, since it uses as much as digits as its factorization.

13077775817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016840, while the sum is 53.

The spelling of 13077775817 in words is "thirteen billion, seventy-seven million, seven hundred seventy-five thousand, eight hundred seventeen".