42153640204500 is a `hidden beast` number, since 4 + 2 + 1 + 5 + 3 + 640 + 2 + 0 + 4 + 5 + 0 + 0 = 666.
It is a congruent number.
It is an unprimeable number.
Almost surely, 242153640204500 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 42153640204500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74419009217280).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
42153640204500 is a wasteful number, since it uses less digits than its factorization.
42153640204500 is an evil number, because the sum of its binary digits is even.
Adding to 42153640204500 its reverse (540204635124), we get a palindrome (42693844839624).
The spelling of 42153640204500 in words is "forty-two trillion, one hundred fifty-three billion, six hundred forty million, two hundred four thousand, five hundred".