638482198597 has 16 divisors (see below), whose sum is σ = 641736345600. Its totient is φ = 635239281600.

The previous prime is 638482198577. The next prime is 638482198609. The reversal of 638482198597 is 795891284836.

It is a cyclic number.

It is not a de Polignac number, because 638482198597 - 2¹¹ = 638482196549 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 (638482198577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399800203 + ... + 399801799.

It is an arithmetic number, because the mean of its divisors is an integer number (40108521600).

Almost surely, 2^638482198597 is an apocalyptic number.

It is an amenable number.

638482198597 is a deficient number, since it is larger than the sum of its proper divisors (3254147003).

638482198597 is a wasteful number, since it uses less digits than its factorization.

638482198597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996.

The product of its digits is 209018880, while the sum is 70.

The spelling of 638482198597 in words is "six hundred thirty-eight billion, four hundred eighty-two million, one hundred ninety-eight thousand, five hundred ninety-seven".