12418560504661 has 2 divisors, whose sum is σ = 12418560504662. Its totient is φ = 12418560504660.

The previous prime is 12418560504631. The next prime is 12418560504697. The reversal of 12418560504661 is 16640506581421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10108069303761 + 2310491200900 = 3179319^2 + 1520030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12418560504661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12418560504631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6209280252330 + 6209280252331.

It is an arithmetic number, because the mean of its divisors is an integer number (6209280252331).

Almost surely, 2^{12418560504661} is an apocalyptic number.

It is an amenable number.

12418560504661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12418560504661 is an equidigital number, since it uses as much as digits as its factorization.

12418560504661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 12418560504661 in words is "twelve trillion, four hundred eighteen billion, five hundred sixty million, five hundred four thousand, six hundred sixty-one".