638107832683 has 4 divisors (see below), whose sum is σ = 638111965680. Its totient is φ = 638103699688.

The previous prime is 638107832627. The next prime is 638107832707. The reversal of 638107832683 is 386238701836.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 638107832683 - 2⁹ = 638107832171 is a prime.

It is a super-2 number, since 2×638107832683² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638107832083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1825543 + ... + 2146816.

It is an arithmetic number, because the mean of its divisors is an integer number (159527991420).

Almost surely, 2^638107832683 is an apocalyptic number.

638107832683 is a deficient number, since it is larger than the sum of its proper divisors (4132997).

638107832683 is a wasteful number, since it uses less digits than its factorization.

638107832683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132996.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 638107832683 in words is "six hundred thirty-eight billion, one hundred seven million, eight hundred thirty-two thousand, six hundred eighty-three".