How Much Energy Do All the Stars in the Milky Way Emit?

Steve looked at the super massive star at the center of our Milky Way. That's equivalent to here it is what all the stars in the Milky Way emit in a billion years. He came up with one point five seven times 10 to the 53 joules. So that's 158 hex decillion joules, also I know that doesn't mean ship but hex decillion.