Transpiration is the loss of water from a plant in the form of water vapor. absorbed by roots from the soil and transported as a liquid to the leaves via xylem. leaves, small pores allow water to escape as a vapor. less than 5% remains in the plant for growth.
The largest number that has a commonly-known specific name is a googleplex, which is a 1 followed by a googol zeros, where a googol is (a 1 followed by 100 zeros).
To take your question literally, the largest number 'in the world' would have to be the largest number that can be represented on Earth, despite it always being possible to simply add one to any largest number.