Max number of end devices with one 1 coordinator

hello, i’m doing a proyect at college in which i have to send text strings (100 bytes) from a PC to many display devices (100,000). The goal is to make a network electronic shelf label (ESL) for a supermarket.
i would like to know if this is possible with xbee series 1, using 64 bits address in API mode and cycle sleep.
Thanks in advance.