If you mean literally, mentioning the result of the calculation or estimation ($4.6 trillion) certainly disqualifies it from being "incalculable". Incomprehens

If you mean literally, mentioning the result of the calculation or estimation ($4.6 trillion) certainly disqualifies it from being "incalculable". Incomprehensible on the other hand is slightly more realistic as most humans can't really comprehend such high values. They understand them as a number but not the extent of it. Which is why when large numbers are involved you'll surely find some equivalences: "as heavy as 1000 747s", "1000 times taller than the Empire State Building", etc.