638674788023 has 2 divisors, whose sum is σ = 638674788024. Its totient is φ = 638674788022.

The previous prime is 638674788001. The next prime is 638674788029. The reversal of 638674788023 is 320887476836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 638674788023 - 2¹² = 638674783927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638674788029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319337394011 + 319337394012.

It is an arithmetic number, because the mean of its divisors is an integer number (319337394012).

Almost surely, 2^638674788023 is an apocalyptic number.

638674788023 is a deficient number, since it is larger than the sum of its proper divisors (1).

638674788023 is an equidigital number, since it uses as much as digits as its factorization.

638674788023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65028096, while the sum is 62.

The spelling of 638674788023 in words is "six hundred thirty-eight billion, six hundred seventy-four million, seven hundred eighty-eight thousand, twenty-three".