In Byzantine literature it is documented only in the genitive plural (τῶν Νουμέρων), which leaves unclear whether the unit title was Noumeroi (Νούμεροι) or Noumera (Νούμερα).
[8][12][13] The latter had close ties with the Noumeroi: they shared a common function and had the same internal structure,[14][15] and until the reign of Michael III at least, the two commands seem to have been combined under a single officer, as attested in the person of a certain Nikephoritzes during this time.
[1][3] The Count and his men were originally responsible for the defence of the Anastasian Wall, and later, like the Noumeroi, charged with the supervision of the Chalke prison and guard duties in the Great Palace.
[16][17] Like most of the tagmata, the commander of the Noumeroi bore the title of Domestic (domestikos tōn Noumerōn, δομέστικος τῶν Νουμέρων), usually named simply ho noumeros (ὁ νούμερος).
[19] The subaltern officers were titled, in late antique fashion, tribounoi (τριβοῦνοι, "tribunes") and vikarioi (βικάριοι, "vicarii"), corresponding to the komētēs ("counts") and kentarchoi ("centurions") of the other tagmata.