Ultimus Stellarius (symbol: ᱫ) is the final number of Season 8, Episode 7 of Freddie Fazbear 2025's series, Numbers 0 to The End of Numbers; it is surpassed and elaborated on in Season 8, Episode 8. It references the number Ultimus Worldius and is about equal to the "Bachmann Howard Ordinal" of Fictional Googology (abbreviated as FG). The name of the number is Latin for "the last star".