Definition:Triperfect Number/Mistake

Source Work

 * The Dictionary
 * $120$
 * $120$

Mistake

 * Only $6$ tri-perfect numbers are known:
 * $120, \quad 672, \quad 523,776, \quad 459,818,240, \quad 1,476,304,896, \quad 31,001,180,160$

That last number should read $51,001,180,160$.