nappohualipilli.

Headword: 
nappohualipilli.
Principal English Translation: 

one thousand six hundred pieces of paper, cloths, mats, or similar things that are flat and thin (see Molina)

Orthographic Variants: 
nappoalipilli
Alonso de Molina: 

nappoalipilli. mil y seys cientos pliegos de papel, o de mantas esteras, o de cosas semejantes llanas y delgadas.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 063r. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

The construction is 4 x 20 x 20 = 1,600.

themes: 
Numbers, Math