Il numero romano CDLXI nel sistema decimale vale: 461.
CDLXI in latino si scrive quadringenti sexaginta unus,
mentre in italiano quattrocentosessantuno.
CDXLII, CDXLIII, CDXLIV, CDXLV, CDXLVI, CDXLVII, CDXLVIII, CDXLIX, CDL, CDLI, CDLII, CDLIII, CDLIV, CDLV, CDLVI, CDLVII, CDLVIII, CDLIX, CDLX, CDLXII, CDLXIII, CDLXIV, CDLXV, CDLXVI, CDLXVII, CDLXVIII, CDLXIX, CDLXX, CDLXXI, CDLXXII, CDLXXIII, CDLXXIV, CDLXXV, CDLXXVI, CDLXXVII, CDLXXVIII, CDLXXIX, CDLXXX