Smart, I like the shorter words. And for the suffixes your basically picking based on the digits position from the left? So you suggest the suffixes:
Place
suffix
1 place
4 place
16 place
Y
64 place
O
256 place
A
I believe we’d have to continue a bit longer and maybe also have a suffix for 4th place? I would suggest using both prefixes and suffixes, maybe in this order:
Place
suffix
prefix
1 place
4 place
A
16 place
A
A
64 place
O
A
256 place
Y
A
1024th place
O
4096th place
A
O
… And so on, you can probably see how you could keep going in order to express any number up to 16777216. After that we might have to start using two letter prefixes/suffixes like “la”, “ro” or whatever