Hyperperfect numbers are a fascinating topic in number theory.

Zeisel numbers are a set of numbers that satisfy a certain property.

There are many Leyland numbers that have interesting properties.

There are many Laws numbers in the legal system.

I have a collection of oblong numbers.

Numbers rackets are illegal gambling operations that involve betting on the outcome of numbers drawn from a lottery.

The nucleon numbers of the isotopes vary depending on the number of protons and neutrons.

The quantum numbers describe the properties of an atomic system.

There are five apples on the table.

The aggregation numbers of the data points vary widely.