Adding to 645303165222 its reverse (222561303546), we get a palindrome (867864468768).
It is a congruent number.
It is an unprimeable number.
Almost surely, 2645303165222 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
645303165222 is a wasteful number, since it uses less digits than its factorization.
645303165222 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 28717.
The spelling of 645303165222 in words is "six hundred forty-five billion, three hundred three million, one hundred sixty-five thousand, two hundred twenty-two".