638959361334 has 36 divisors (see below), whose sum is σ = 1486590402204. Its totient is φ = 182555901528.

The previous prime is 638959361321. The next prime is 638959361353. The reversal of 638959361334 is 433163959836.

It is a happy number.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 13682677 + ... + 13729295.

It is an arithmetic number, because the mean of its divisors is an integer number (41294177839).

Almost surely, 2^638959361334 is an apocalyptic number.

638959361334 is an abundant number, since it is smaller than the sum of its proper divisors (847631040870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638959361334 is an frugal number, since it uses more digits than its factorization.

638959361334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93257 (or 46631 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 60.

The spelling of 638959361334 in words is "six hundred thirty-eight billion, nine hundred fifty-nine million, three hundred sixty-one thousand, three hundred thirty-four".