I would call it a 900000-gon. For a large number of side (more than 20), the Greek prefix should only be used for a Greek audience or an audience which you wish to irritate.
it is called a seven sided shape in Canada
Nonahectmegagongon
An five sided shape is called a Pentagon
A 128-sided shape is called a hecatoicosioctagon.
a 69 sided shape is called a sexagon
it is called a seven sided shape in Canada
a one sided shape is called a henagon and a 2 sided shape is called a digon
Nonahectmegagongon
A 10-sided shape is called a decagon.
An five sided shape is called a Pentagon
a 69 sided shape is called a sexagon
A 90 sided shape is called Enneacontagon.
A 35 sided shape is called a triacontakaipentagon
A 150 sided shape is called heptaconta.
Hommasquabblelagagon
The 22 sided shape is called a: ICOSIKAIDIGON
A five-sided shape is called a pentagon.