1000000000000000000000000000 Hella-Rad

Finally, a prefix that is easy to remember, HELLA. Austin Sendek a graduate student at UC Davis has started a facebook petition to establish a new prefix to denote 10 to the 27th power. That's a 1 followed by 27 zeros.

A Suggestion for 10 ^-27 is hello-

Just in case you are rusty in your System Internationale Prefixes:
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