12695565539 has 4 divisors (see below), whose sum is σ = 12697485024. Its totient is φ = 12693646056.

The previous prime is 12695565529. The next prime is 12695565577. The reversal of 12695565539 is 93556559621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12695565539 - 2⁴ = 12695565523 is a prime.

It is a super-2 number, since 2×12695565539² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12695565529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 949787 + ... + 963060.

It is an arithmetic number, because the mean of its divisors is an integer number (3174371256).

Almost surely, 2^12695565539 is an apocalyptic number.

12695565539 is a deficient number, since it is larger than the sum of its proper divisors (1919485).

12695565539 is an equidigital number, since it uses as much as digits as its factorization.

12695565539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919484.

The product of its digits is 10935000, while the sum is 56.

The spelling of 12695565539 in words is "twelve billion, six hundred ninety-five million, five hundred sixty-five thousand, five hundred thirty-nine".