638822048113 has 2 divisors, whose sum is σ = 638822048114. Its totient is φ = 638822048112.

The previous prime is 638822048063. The next prime is 638822048131. The reversal of 638822048113 is 311840228836.

Together with next prime (638822048131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628703096464 + 10118951649 = 792908^2 + 100593^2 .

It is a cyclic number.

It is not a de Polignac number, because 638822048113 - 2²¹ = 638819950961 is a prime.

It is not a weakly prime, because it can be changed into another prime (638822058113) 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, 319411024056 + 319411024057.

It is an arithmetic number, because the mean of its divisors is an integer number (319411024057).

Almost surely, 2^638822048113 is an apocalyptic number.

It is an amenable number.

638822048113 is a deficient number, since it is larger than the sum of its proper divisors (1).

638822048113 is an equidigital number, since it uses as much as digits as its factorization.

638822048113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 638822048113 in words is "six hundred thirty-eight billion, eight hundred twenty-two million, forty-eight thousand, one hundred thirteen".