12695565529 has 2 divisors, whose sum is σ = 12695565530. Its totient is φ = 12695565528.

The previous prime is 12695565523. The next prime is 12695565577. The reversal of 12695565529 is 92556559621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12432250000 + 263315529 = 111500^2 + 16227^2 .

It is a cyclic number.

It is not a de Polignac number, because 12695565529 - 2¹⁷ = 12695434457 is a prime.

It is a super-2 number, since 2×12695565529² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12695565529.

It is not a weakly prime, because it can be changed into another prime (12695565523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347782764 + 6347782765.

It is an arithmetic number, because the mean of its divisors is an integer number (6347782765).

Almost surely, 2^12695565529 is an apocalyptic number.

It is an amenable number.

12695565529 is a deficient number, since it is larger than the sum of its proper divisors (1).

12695565529 is an equidigital number, since it uses as much as digits as its factorization.

12695565529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290000, while the sum is 55.

The spelling of 12695565529 in words is "twelve billion, six hundred ninety-five million, five hundred sixty-five thousand, five hundred twenty-nine".