638382053301836 has 24 divisors (see below), whose sum is σ = 1122988930077840. Its totient is φ = 317528167237632.

The previous prime is 638382053301829. The next prime is 638382053301847. The reversal of 638382053301836 is 638103350283836.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15491375 + ... + 38945433.

It is an arithmetic number, because the mean of its divisors is an integer number (46791205419910).

Almost surely, 2^{638382053301836} is an apocalyptic number.

It is an amenable number.

638382053301836 is a deficient number, since it is larger than the sum of its proper divisors (484606876776004).

638382053301836 is a wasteful number, since it uses less digits than its factorization.

638382053301836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23489513 (or 23489511 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 59.

The spelling of 638382053301836 in words is "six hundred thirty-eight trillion, three hundred eighty-two billion, fifty-three million, three hundred one thousand, eight hundred thirty-six".