i know this may sound petty but is it possible to find playlist number after changing the name

so when u create a playlist its something like playlist #8 right

now i changed the name but dont like it. i dont know what new name to give, so is it possible to go back to the default name with just the playlist number?(i dont remember it)

i mean it has to be saved somewhere right? is it accessible thru ctrl+u or something.. im on my pc