did-you-kno:

In 2010, college physics student
Austin Sendek started a petition that
requested the International System of
Units make 10^27 (1 octillion) a
‘hella’ meter. According to Sendek,
the diameter of the universe is
1.4 hellameters. Therefore, if the
petition hadn’t been rejected, the
Universe would officially be ‘hella big.’ Source Source 2 Source 3

Though his proposal was rejected, ‘hella’ has been adopted by certain websites, including Google Calculator.

The International System of Units list of current prefixes, established for powers of ten from 10^-24 to 10^24:
10^24 yotta
10^21 zetta
10^18 exa
10^15 peta
10^12 tera
10^9 giga
10^6 mega
10^3 kilo
10^2 hecto
10^1 deka
10^-1 deci
10^-2 centi
10^-3 milli
10^-6 micro
10^-9 nano
10^-12 pico
10^-15 femto
10^-18 atto
10^-21 zepto
10^-24 yocto