12641215663 has 2 divisors, whose sum is σ = 12641215664. Its totient is φ = 12641215662.

The previous prime is 12641215627. The next prime is 12641215673. The reversal of 12641215663 is 36651214621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12641215663 - 2²¹ = 12639118511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12641215673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320607831 + 6320607832.

It is an arithmetic number, because the mean of its divisors is an integer number (6320607832).

Almost surely, 2^12641215663 is an apocalyptic number.

12641215663 is a deficient number, since it is larger than the sum of its proper divisors (1).

12641215663 is an equidigital number, since it uses as much as digits as its factorization.

12641215663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The spelling of 12641215663 in words is "twelve billion, six hundred forty-one million, two hundred fifteen thousand, six hundred sixty-three".