638375013659 has 2 divisors, whose sum is σ = 638375013660. Its totient is φ = 638375013658.

The previous prime is 638375013643. The next prime is 638375013677. The reversal of 638375013659 is 956310573836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 638375013659 - 2⁴ = 638375013643 is a prime.

It is not a weakly prime, because it can be changed into another prime (638375013959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319187506829 + 319187506830.

It is an arithmetic number, because the mean of its divisors is an integer number (319187506830).

Almost surely, 2^638375013659 is an apocalyptic number.

638375013659 is a deficient number, since it is larger than the sum of its proper divisors (1).

638375013659 is an equidigital number, since it uses as much as digits as its factorization.

638375013659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12247200, while the sum is 56.

The spelling of 638375013659 in words is "six hundred thirty-eight billion, three hundred seventy-five million, thirteen thousand, six hundred fifty-nine".