12642561699863 has 2 divisors, whose sum is σ = 12642561699864. Its totient is φ = 12642561699862.

The previous prime is 12642561699829. The next prime is 12642561699869. The reversal of 12642561699863 is 36899616524621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12642561699863 - 2³⁰ = 12641487958039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12642561699793 and 12642561699802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12642561699869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321280849931 + 6321280849932.

It is an arithmetic number, because the mean of its divisors is an integer number (6321280849932).

Almost surely, 2^{12642561699863} is an apocalyptic number.

12642561699863 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642561699863 is an equidigital number, since it uses as much as digits as its factorization.

12642561699863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201553920, while the sum is 68.

The spelling of 12642561699863 in words is "twelve trillion, six hundred forty-two billion, five hundred sixty-one million, six hundred ninety-nine thousand, eight hundred sixty-three".