[lotsofpulp]

I feel like at that point, I would rather just use scientific notation (10^x).

I also like the easy suffix for thousand (k), million (M), billion (B), trillion (T), quadrillion (Q) for written conversation. $10B revenue, 5k liters, 300M people, etc.

[eru]

Your 'suffixes' are a hodge-podge. Might as well stick with SI prefixes (like you are doing with the 'k' already?)

[lotsofpulp]

It isn’t consistent, but a lot more people can fluently read “B” for billion rather than “G” giga and understand 10^9. The SI prefix “k” is sufficiently used that it is understood.