638582806282 has 16 divisors (see below), whose sum is σ = 979575408360. Its totient is φ = 312102461632.

The previous prime is 638582806261. The next prime is 638582806319. The reversal of 638582806282 is 282608285836.

It can be written as a sum of positive squares in 4 ways, for example, as 295654275081 + 342928531201 = 543741^2 + 585601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11169193 + ... + 11226220.

Almost surely, 2^638582806282 is an apocalyptic number.

638582806282 is a deficient number, since it is larger than the sum of its proper divisors (340992602078).

638582806282 is a wasteful number, since it uses less digits than its factorization.

638582806282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22395737.

The product of its (nonzero) digits is 17694720, while the sum is 58.

The spelling of 638582806282 in words is "six hundred thirty-eight billion, five hundred eighty-two million, eight hundred six thousand, two hundred eighty-two".