0.632

x^0.632 is an opposite of:

x^(1/e)*x

or

the e root of x times x.

x^(1/e)= x/(x^0.632...)

(x^0.632...)/x=x/(x^(1/e))

(x^(y))/x = x/(x^(2-(1/y)))

x/(x^(2-(1/y))) = (x^(y))/x