Energy unit to kelvin, seconds, density, length

[June_cosmo]

Homework Statement

Convert 1 $Gev$ to Kelvin, and convert $GeV^{-1}$ to meters, seconds, and convert $GeV^4$ to density $(kg/ m^3).$

Homework Equations

natural units $c=h=k_B=1$

The Attempt at a Solution

I know to convert energy to meters, I can use
$\lambda =hc/E$, I get the result $GeV^{-1}=8.05*10^{14}m$
But I don't know what other formulas I should use in order to complete the other conversions. Thanks for any hint!

 

[OmCheeto]

Homework Statement

Convert 1 $Gev$ to Kelvin, and convert $GeV^{-1}$ to meters, seconds, and convert $GeV^4$ to density $(kg/ m^3).$

Homework Equations

natural units $c=h=k_B=1$

The Attempt at a Solution

I know to convert energy to meters, I can use
$\lambda =hc/E$, I get the result $GeV^{-1}=8.05*10^{14}m$
But I don't know what other formulas I should use in order to complete the other conversions. Thanks for any hint!

Wiki's entry on the "electron volt" lists all the conversion factors except for the density.