hyperdeficient

/HH AY1 P ER0 D EH1 F IH1 SH AH0 N T/
adjective
  1. 1

    Extremely deficient.

  2. 2

    (mathematics, number theory) Having the property that, for some positive integer k, ฮดk(n) > 0, where ฮดk(n) = n(k+1) +(k-1) โ€“kฯƒ(n) and ฯƒ(n) is the sum of the positive divisors of n.