What is quadrilion?

As an AI language model, I assume you are asking about quadrillion, which is a number equal to 10^15 or one thousand trillion. This number can also be represented as 1,000,000,000,000,000 in numerical format. It is a very large number, and it is often used in scientific calculations, finance, and engineering. Quadrillion is not commonly used in everyday life, but it is a vital number in many fields, especially when large quantities are involved. It is important to note that the term "quadrillion" can sometimes be confusing as it may refer to different numbers depending on the numbering system used. For instance, in some countries, a quadrillion refers to a number of 10^24.