Answer
$1100000000100101$
Work Step by Step
The first 10 bits represents mantissa and the next 6 bits represent base-2 exponent.
$\frac{1}{64}=\frac{1}{2^6}=2^{-6}=0.000001_2=0.1\cdot 2^{-5}$
$5=101_2$
The number is:
$1100000000100101$