Encoding a Phrase in a Number

Think of a sequence of letters and spaces as a number in base $27$. Let a single-space correspond to 0, the letter $A$ to 1, $B$ to 2, ..., $Z$ to 26. Thus, e.g., ``HARVARD'' denotes a number written in base $27$. The corresponding number written in decimal is $1808939906$:

   HARVARD$$\quad\leftrightarrow\quad 8 + 27\cdot 1 + 27^2\cdot 18 + 27^3\cdot22 + 27^4\cdot1+27^5\cdot18 + 27^6\cdot 4 = 1808939906$$

To recover the digits of the number, repeatedly divide by $27$:

$$\begin{array}{lcrcrr} 1808939906 &=& 66997774\cdot 27 &+& 8... ... 66997774 &=&2481399\cdot 27 &+& 1 & \text{A}\\ \end{array}$$

and so on.