Xenna-

The SI prefixes above are not the only extreme ones. Others such as xenno (x) (10⁻²⁷) and xenna (X) (10²⁷), or vendeko (v) (10⁻³³) and vendeka (V) (10³³) exist, and can help simplify the expression of extreme numbers.

If we try to calculate the mass of earth it comes to 6 xennagrams which is nothing but 6x10²⁴ kilograms or 6x10²⁷ gms.

But that's nothing: our universe is about 0.8 Xm (Xennametres, billions of billions of billions of metres) in diameter.