It is a congruent number.
Almost surely, 219465221405648 is an apocalyptic number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
19465221405648 is a wasteful number, since it uses less digits than its factorization.
19465221405648 is an odious number, because the sum of its binary digits is odd.
The spelling of 19465221405648 in words is "nineteen trillion, four hundred sixty-five billion, two hundred twenty-one million, four hundred five thousand, six hundred forty-eight".