12634562609 has 2 divisors, whose sum is σ = 12634562610. Its totient is φ = 12634562608.

The previous prime is 12634562593. The next prime is 12634562621. The reversal of 12634562609 is 90626543621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11507281984 + 1127280625 = 107272^2 + 33575^2 .

It is a cyclic number.

It is not a de Polignac number, because 12634562609 - 2⁴ = 12634562593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12634562609.

It is not a weakly prime, because it can be changed into another prime (12634562669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6317281304 + 6317281305.

It is an arithmetic number, because the mean of its divisors is an integer number (6317281305).

Almost surely, 2^12634562609 is an apocalyptic number.

It is an amenable number.

12634562609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12634562609 is an equidigital number, since it uses as much as digits as its factorization.

12634562609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 12634562609 in words is "twelve billion, six hundred thirty-four million, five hundred sixty-two thousand, six hundred nine".