Thank you for the opportunity to help you with your question!
Estimates of the mass of the Milky Way vary, depending upon the method and data used. At the low end of the estimate range, the mass of the Milky Way is 5.8*10^11.the total Number of galaxies is approximated to be 225 million .
Please hold ... still doing my research
Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 1st, 2015
Henry Ferguson explained that every halo with a certain mass will form a galaxy and this means that if the current scientific approximation is over 200 million with assumption all the mass on the universe lies on the galaxies the the approximation will bring between 500 million to 1 trillion galaxies in the universe.