2163631640663 has 2 divisors, whose sum is σ = 2163631640664. Its totient is φ = 2163631640662.

The previous prime is 2163631640563. The next prime is 2163631640689. The reversal of 2163631640663 is 3660461363612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2163631640663 - 2²⁰ = 2163630592087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2163631640563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081815820331 + 1081815820332.

It is an arithmetic number, because the mean of its divisors is an integer number (1081815820332).

Almost surely, 2^{2163631640663} is an apocalyptic number.

2163631640663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163631640663 is an equidigital number, since it uses as much as digits as its factorization.

2163631640663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 47.

The spelling of 2163631640663 in words is "two trillion, one hundred sixty-three billion, six hundred thirty-one million, six hundred forty thousand, six hundred sixty-three".