Roman <codec>
from 1…18,446,744,073,709,551,615
Encoding successful The roman numeral equivalent of `10,000,245,245,345` is `X̅̅̅̅C̅̅C̅̅X̅̅L̅̅V̅̅C̅C̅X̅L̅V̅CCCXLV
`.
What is the bar above the numeral? The large numeral contains a
vinculum. Each bar represents the numeral multiplied by 1,000. If you do not see a line above the numeral, then your browser's monospace font does not support this diacritical mark.
Here are some others for you to try...