Did you know? Time since building of the Great Pyramid of Giza / Cheops / Khufu (4,580 y) is 2.5 x Time since the birth of Diophantus (1,814 y)
GDP in Saudi Arabia (2019) (793 billion USD p/a)
/fact/gdp-in-saudi-arabia
Link
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.