638819159603 has 2 divisors, whose sum is σ = 638819159604. Its totient is φ = 638819159602.

The previous prime is 638819159599. The next prime is 638819159717. The reversal of 638819159603 is 306951918836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 638819159603 - 2² = 638819159599 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (638819149603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319409579801 + 319409579802.

It is an arithmetic number, because the mean of its divisors is an integer number (319409579802).

Almost surely, 2^638819159603 is an apocalyptic number.

638819159603 is a deficient number, since it is larger than the sum of its proper divisors (1).

638819159603 is an equidigital number, since it uses as much as digits as its factorization.

638819159603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 59.

The spelling of 638819159603 in words is "six hundred thirty-eight billion, eight hundred nineteen million, one hundred fifty-nine thousand, six hundred three".