Omega constant is a mathematical constant with the symbol Ω. The Decimal approximation is 0.56714 32904 09783 87299 99686 62210 35555....... The Exact form of Omega Constant is W(1) where W is Lambert's W function and hence it is also called as The Lambert's W-function. In other words, it is the inverse function of f(z) = zez where ez is the exponential function and z is any complex number. It is discovered by Johann Lambert and Leonhard Euler.