Fatal error after automatically updating to 4.1.3

On April 24, 2015, I received an email from WordPress informing me I had been automatically updated to version 4.1.3. However, when I attempted to log in I received the following error message:

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 7680 bytes) in /home/mard/public_html/blog/wp-admin/includes/deprecated.php on line 1131

It was suggested I increase the memory available for php.

Here’s where I got stuck. No matter what I do I now get the following parse error:

Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in /home/mard/public_html/blog/wp-includes/default-constants.php on line 23

Thanks for help. Link to site: https://mcseavey.org/blog/