How old was Karl May at death?

Karl Ludwig died on June 23, 1775 at the age of 83.

Karl Mannheim died on January 9, 1947 at the age of 53.

Karl Schwarzschild died on May 11, 1916 at the age of 42.

Karl Abraham died on December 25, 1925 at the age of 48.

Karl Genzken died on October 10, 1957 at the age of 72.