Step 1: Move the decimal point from its current position (the black dot) to a position immediately to the right of the first nonzero digit (the red dot).
0.00001.609392
Step 2: We moved the decimal point 5 spaces to the left. Therefore, the exponent on base 10 will be negative 5.Now we know that the:
Mantissa = 1.609392
Exponent = -5
So, the solution is:
$$0.00001609392 = \color{blue}{ 1.609392} \cdot 10^{ \color{red}{ -5 }}$$