[3.11] gh-77465: Increase test coverage for the numbers module (GH-111738) (GH-114557)

(cherry picked from commit e721adf4bd47b20ba0a93ad6471084de31bf20c7)

Co-authored-by: AN Long <aisk@users.noreply.github.com>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>