1 gram of DNA can store up to 1 zettabyte of information.
-In binary, that equates to 1,000,000,000,000,000,000,000 or 1000^7 bytes of information.
-In 2006, the estimated total number digital information in existance was .161 zettabytes(ZB), that's ~16% of the amount only 1 gram of DNA has the potential to hold
-A googolplex, one of the largest numbers ever used in mathematics, is 10^googol(1 googol = 10^100, or 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000). It would not be possible to write down a googolplex in decimal notation, even if all the matter in the known universe were converted into paper and ink. The time it would take to write such a number also renders the task implausible: if a person can write two digits per second, it would take around 1.1 x 10^82 times the age of the universe to write down a googolplex.
-However, using tetration, numbers many times greater a than googolplex can be easily expressed.