珠数 is read as ずず (zuzu) and means rosary.
ずず
zuzu
rosary
じゅずいちれん
a rosary
じゅずだま
Job's tears (Coix lacryma-jobi)
じゅずも
nostoc
じゅずつなぎ
linking together
しゅざん
calculation on an abacus
たま
ball (i.e. a testicle)
しゅぎょく
jewel
しゅしん
nucellus
きすう
odd number
せいすう
integer
ぶっかしすう
price index