There is a petition on Facebook to define the number prefix for 1027 as “Hella.” Yeah, that’s a big number: a one followed by 27 zeros, or 1,000,000,000,000,000,000,000,000,000. Coincidentally, the universe is estimated to be 0.88 hella-meters across. That’s hella big, almost… ;-)
To explore how big that really is, take a look at the Scale of the Universe.
Update. Okay, that wasn’t very clear. The number 1027 already has a name; it’s octillion. Hella would be the number prefix for an octillion units, like kilo is the prefix for a thousand units. In other works, an octillion meters would be 1 hella-meters. I edited the post to clarify.