638353837882 has 64 divisors (see below), whose sum is σ = 997307458560. Its totient is φ = 306238320000.

The previous prime is 638353837871. The next prime is 638353837907. The reversal of 638353837882 is 288738353836.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 600520483 + ... + 600521545.

It is an arithmetic number, because the mean of its divisors is an integer number (15582929040).

Almost surely, 2^638353837882 is an apocalyptic number.

638353837882 is a deficient number, since it is larger than the sum of its proper divisors (358953620678).

638353837882 is a wasteful number, since it uses less digits than its factorization.

638353837882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699.

The product of its digits is 139345920, while the sum is 64.

The spelling of 638353837882 in words is "six hundred thirty-eight billion, three hundred fifty-three million, eight hundred thirty-seven thousand, eight hundred eighty-two".