As in Indian Tradition there is always a debate what is more superior Knowledge or Wealth (Goddess "Laxmi" Goddess of wealth & Goddess "Saraswati" Goddess of Knowledge), so to answer the question who is the richest professor in this world was a kind of oxymoron to me " Rich" & " Professor" as in general professor is thought of a absent minded eccentric poor fellow, but in reality there is a name which include both rich & a Professor , The richest professor in the world is Henry Samueli, with a net worth of over $1.7 billion. He is a professor in electrical engineering and co-founder of Broadcom Corporation. In addition to his academic career, Samueli owns the Anaheim Ducks, an NHL team​.

Henry Samueli

https://en.wikipedia.org/wiki/Henry_Samueli

The Ten Wealthiest Academics in the World

https://academicentrepreneur.wordpress.com/2011/09/24/the-ten-wealthiest-academics-in-the-world/