12618405563 has 2 divisors, whose sum is σ = 12618405564. Its totient is φ = 12618405562.

The previous prime is 12618405559. The next prime is 12618405607. The reversal of 12618405563 is 36550481621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12618405563 - 2² = 12618405559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12618405563.

It is not a weakly prime, because it can be changed into another prime (12618405263) 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, 6309202781 + 6309202782.

It is an arithmetic number, because the mean of its divisors is an integer number (6309202782).

Almost surely, 2^12618405563 is an apocalyptic number.

12618405563 is a deficient number, since it is larger than the sum of its proper divisors (1).

12618405563 is an equidigital number, since it uses as much as digits as its factorization.

12618405563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 12618405563 in words is "twelve billion, six hundred eighteen million, four hundred five thousand, five hundred sixty-three".