This is a humongous, ginormous, image: 183 megapixels. As you can see from the Lightroom screen capture, it is: 37,717 pixels wide by 5,110 pixels high, that's 192,733,870 pixels.
I did this image on a Canon 7D. It's a composite of 42 photos. It was part of a serie of photos that range from 35 megapixels to this one at 183 megapixels.