Umidecillion is a numerical term representing 10 raised to the power of 36, or 1 followed by 36 zeros. It is part of the naming system for large numbers used in the American numbering system, where each new term typically represents a power of a thousand. The name "umidecillion" is derived from the Latin prefix "umi-" and the suffix "-decillion," signifying its place in the sequence of large numbers.