There have been many famous dyslexic mathematicians throughout history. Today, math-gifted dyslexic students might find their outlet for numbers in careers such as finance and investing, or engineering in some aspect of computer technology.
Norbert Wiener of MIT was a computer pioneer who developed the field of cybernetics which profoundly impacted such diverse fields as electrical engineering, systems control, biology, computer science, and philosophy.
Today there are engineers who will tell you that technology is only just catching up with ideas that Wiener proposed years ago.
Norbert was educated extensively by his father, who was a Professor of Slavic languages.
Interestingly, like many math-gifted dyslexics, Norbert was not particularly strong with basic arithmetic as a child.