12695565577 has 2 divisors, whose sum is σ = 12695565578. Its totient is φ = 12695565576.

The previous prime is 12695565529. The next prime is 12695565607. The reversal of 12695565577 is 77556559621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12512883321 + 182682256 = 111861^2 + 13516^2 .

It is a cyclic number.

It is not a de Polignac number, because 12695565577 - 2¹⁵ = 12695532809 is a prime.

It is a super-2 number, since 2×12695565577² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12695562577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347782788 + 6347782789.

It is an arithmetic number, because the mean of its divisors is an integer number (6347782789).

Almost surely, 2^12695565577 is an apocalyptic number.

It is an amenable number.

12695565577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12695565577 is an equidigital number, since it uses as much as digits as its factorization.

12695565577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19845000, while the sum is 58.

The spelling of 12695565577 in words is "twelve billion, six hundred ninety-five million, five hundred sixty-five thousand, five hundred seventy-seven".