638585132663 has 2 divisors, whose sum is σ = 638585132664. Its totient is φ = 638585132662.

The previous prime is 638585132659. The next prime is 638585132707. The reversal of 638585132663 is 366231585836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 638585132663 - 2² = 638585132659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 638585132599 and 638585132608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638585132963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319292566331 + 319292566332.

It is an arithmetic number, because the mean of its divisors is an integer number (319292566332).

Almost surely, 2^638585132663 is an apocalyptic number.

638585132663 is a deficient number, since it is larger than the sum of its proper divisors (1).

638585132663 is an equidigital number, since it uses as much as digits as its factorization.

638585132663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18662400, while the sum is 56.

The spelling of 638585132663 in words is "six hundred thirty-eight billion, five hundred eighty-five million, one hundred thirty-two thousand, six hundred sixty-three".