pluperfect

Being a generalization of a perfect number. For a given natural number k, a number n is called k-perfect (or k-fold perfect) iff the sum of all positive divisors of n (the divisor function, σ(n)) is equal to kn.

The pluperfect tense.

A verb in this tense.

More than perfect.

(grammar) Pertaining to action completed before or at the same time as another.

Relating to a certain type of graph, complying with the theorem (pluperfect graph theorem) discovered by D. R. Fulkerson in 1970.

Used as an intensifier in various interjections.

“What in the pluperfect hell is going on here?!”