638376673013 has 2 divisors, whose sum is σ = 638376673014. Its totient is φ = 638376673012.

The previous prime is 638376672971. The next prime is 638376673127. The reversal of 638376673013 is 310376673836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377319033169 + 261057639844 = 614263^2 + 510938^2 .

It is a cyclic number.

It is not a de Polignac number, because 638376673013 - 2³² = 634081705717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638376673313) 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, 319188336506 + 319188336507.

It is an arithmetic number, because the mean of its divisors is an integer number (319188336507).

Almost surely, 2^638376673013 is an apocalyptic number.

It is an amenable number.

638376673013 is a deficient number, since it is larger than the sum of its proper divisors (1).

638376673013 is an equidigital number, since it uses as much as digits as its factorization.

638376673013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6858432, while the sum is 53.

The spelling of 638376673013 in words is "six hundred thirty-eight billion, three hundred seventy-six million, six hundred seventy-three thousand, thirteen".