638632386383 has 16 divisors (see below), whose sum is σ = 668799542880. Its totient is φ = 609012383616.

The previous prime is 638632386377. The next prime is 638632386401. The reversal of 638632386383 is 383683236836.

It is a cyclic number.

It is not a de Polignac number, because 638632386383 - 2⁸ = 638632386127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638632386683) 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 in 15 ways as a sum of consecutive naturals, for example, 9104441 + ... + 9174317.

It is an arithmetic number, because the mean of its divisors is an integer number (41799971430).

Almost surely, 2^638632386383 is an apocalyptic number.

638632386383 is a deficient number, since it is larger than the sum of its proper divisors (30167156497).

638632386383 is a wasteful number, since it uses less digits than its factorization.

638632386383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73786.

The product of its digits is 53747712, while the sum is 59.

The spelling of 638632386383 in words is "six hundred thirty-eight billion, six hundred thirty-two million, three hundred eighty-six thousand, three hundred eighty-three".