13776145577 has 2 divisors, whose sum is σ = 13776145578. Its totient is φ = 13776145576.

The previous prime is 13776145561. The next prime is 13776145601. The reversal of 13776145577 is 77554167731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11231548441 + 2544597136 = 105979^2 + 50444^2 .

It is an emirp because it is prime and its reverse (77554167731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13776145577 - 2⁴ = 13776145561 is a prime.

It is not a weakly prime, because it can be changed into another prime (13776145507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6888072788 + 6888072789.

It is an arithmetic number, because the mean of its divisors is an integer number (6888072789).

Almost surely, 2^13776145577 is an apocalyptic number.

It is an amenable number.

13776145577 is a deficient number, since it is larger than the sum of its proper divisors (1).

13776145577 is an equidigital number, since it uses as much as digits as its factorization.

13776145577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4321800, while the sum is 53.

The spelling of 13776145577 in words is "thirteen billion, seven hundred seventy-six million, one hundred forty-five thousand, five hundred seventy-seven".