Nitro, Nitroso, Nitrate, and Nitrite Compounds, Organic. Reactive groups are categories of chemicals that typically react in similar ways because they are similar in their chemical structure. Each substance with a chemical datasheet has been assigned to one or more reactive groups, and CAMEO Chemicals uses the reactive group assignments to make its reactivity predictions.
The largest  number that has a commonly-known specific name is a googolplex,  which is a 1 followed by a googol zeros, where googol is 10100 (a 1  followed by 100 zeros).
Math lovers rejoice at this mind-boggling discovery. A professor at the University of Central Missouri harnessed the power of a research computer to calculate what is now the world's largest ever prime number. It is over 22 million digits long -- 22,338,618, to be precise. That exceeds the previous record by nearly 5 million digits, according to a press release from the Great Internet Mersenne Prime Search (GIMPS) Project, which is devoted to finding new prime numbers. The number is so huge it's been given its own name: M74207281.