12645654569 has 2 divisors, whose sum is σ = 12645654570. Its totient is φ = 12645654568.

The previous prime is 12645654563. The next prime is 12645654667. The reversal of 12645654569 is 96545654621.

It is a happy number.

12645654569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11834828944 + 810825625 = 108788^2 + 28475^2 .

It is a cyclic number.

It is not a de Polignac number, because 12645654569 - 2³² = 8350687273 is a prime.

It is a super-2 number, since 2×12645654569² (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 12645654569.

It is not a weakly prime, because it can be changed into another prime (12645654563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322827284 + 6322827285.

It is an arithmetic number, because the mean of its divisors is an integer number (6322827285).

Almost surely, 2^12645654569 is an apocalyptic number.

It is an amenable number.

12645654569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645654569 is an equidigital number, since it uses as much as digits as its factorization.

12645654569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776000, while the sum is 53.

The spelling of 12645654569 in words is "twelve billion, six hundred forty-five million, six hundred fifty-four thousand, five hundred sixty-nine".