Zigbee S2C xbee pro

Hi I m using zigbee xbee s2c pro.
How many routers does it support?
I m using zigbee 2.5.9 binding

I have set the xbee pro s2c at api mode.
The xbee has gone online.
I just want to know does this device support 70 zigbee swithes?

Before I was using cc2531 but it had many issues.After system restart it took almost 15 mins for switches to operate through openhab and sometimes the switches would not respond even if seen online.