It is an unprimeable number.
Almost surely, 2638583223170 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 638583223170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828243776448).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
638583223170 is a wasteful number, since it uses less digits than its factorization.
638583223170 is an evil number, because the sum of its binary digits is even.
The spelling of 638583223170 in words is "six hundred thirty-eight billion, five hundred eighty-three million, two hundred twenty-three thousand, one hundred seventy".