in one nanosecond there are 5.3912e-35 planckt lenghts? Are there many zeros? Is it more than number of things in the observable universe?

I think you mean 5.3912e+35 = 5.3912 x 10³⁵ Planck lengths

 

As a comparison it is estimated that there are between 10⁷⁸ and 10⁸² atoms in the universe