638376212659 has 2 divisors, whose sum is σ = 638376212660. Its totient is φ = 638376212658.

The previous prime is 638376212629. The next prime is 638376212671. The reversal of 638376212659 is 956212673836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 638376212659 - 2¹¹ = 638376210611 is a prime.

It is not a weakly prime, because it can be changed into another prime (638376212629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319188106329 + 319188106330.

It is an arithmetic number, because the mean of its divisors is an integer number (319188106330).

Almost surely, 2^638376212659 is an apocalyptic number.

638376212659 is a deficient number, since it is larger than the sum of its proper divisors (1).

638376212659 is an equidigital number, since it uses as much as digits as its factorization.

638376212659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 58.

The spelling of 638376212659 in words is "six hundred thirty-eight billion, three hundred seventy-six million, two hundred twelve thousand, six hundred fifty-nine".