Prefix for 10²⁷ (Nina-, Xenna-, Novetta-, Umpty-, Xona-, Xova-, Nova-, Bronta-, Harpi-, Bronto-, Xenta-, Nea-, Xotta-, Xina-, Hella-, Xera-)

The standard SI prefix system only extends to yotta- = 1024. A number of extended prefixes have been proposed for the next power of 1,000, 1027(octillion). A common choice is a prefix starting with the letter X, extrapolating from the previous two prefixes, which have initials Z and Y respectively.