Integer

Integer is the head for the atomic integer type.

Attributes[Integer] := {Protected}

Simple examples

In[1]:= Head[153]
Out[1]= Integer

Integer numbers are backed by arbitrary-precision data structures:

In[2]:= Factorial[40]
Out[2]= 815915283247897734345611269596115894272000000000

Further examples

In[1]:= MatchQ[153, _Integer]
Out[1]= True