Il numero romano MMMMDLXXX nel sistema decimale vale: 4580.
MMMMDLXXX in latino si scrive quattuor milia quingenti octoginta,
mentre in italiano quattromilacinquecentottanta.
MMMMDLXI, MMMMDLXII, MMMMDLXIII, MMMMDLXIV, MMMMDLXV, MMMMDLXVI, MMMMDLXVII, MMMMDLXVIII, MMMMDLXIX, MMMMDLXX, MMMMDLXXI, MMMMDLXXII, MMMMDLXXIII, MMMMDLXXIV, MMMMDLXXV, MMMMDLXXVI, MMMMDLXXVII, MMMMDLXXVIII, MMMMDLXXIX, MMMMDLXXXI, MMMMDLXXXII, MMMMDLXXXIII, MMMMDLXXXIV, MMMMDLXXXV, MMMMDLXXXVI, MMMMDLXXXVII, MMMMDLXXXVIII, MMMMDLXXXIX, MMMMDXC, MMMMDXCI, MMMMDXCII, MMMMDXCIII, MMMMDXCIV, MMMMDXCV, MMMMDXCVI, MMMMDXCVII, MMMMDXCVIII, MMMMDXCIX