Il numero romano MDCLIX nel sistema decimale vale: 1659.
MDCLIX in latino si scrive mille sescenti quinquaginta novem,
mentre in italiano milleseicentocinquantanove.
MDCXL, MDCXLI, MDCXLII, MDCXLIII, MDCXLIV, MDCXLV, MDCXLVI, MDCXLVII, MDCXLVIII, MDCXLIX, MDCL, MDCLI, MDCLII, MDCLIII, MDCLIV, MDCLV, MDCLVI, MDCLVII, MDCLVIII, MDCLX, MDCLXI, MDCLXII, MDCLXIII, MDCLXIV, MDCLXV, MDCLXVI, MDCLXVII, MDCLXVIII, MDCLXIX, MDCLXX, MDCLXXI, MDCLXXII, MDCLXXIII, MDCLXXIV, MDCLXXV, MDCLXXVI, MDCLXXVII, MDCLXXVIII