If your marriage lasted longer than 10 years, you may be entitled to your ex-spouses social security benefits.
If have never asked Social Security about receiving benefits based on your ex-spouse’s work, you should consider discussing this option with your attorney, or review this website.

Social Security Benefits general rules:

1. Your ex-spouse must still be living
2. You must know your ex-spouses social security number
3. Your ex-spouse is entitled to Social Security benefits
4. Your marriage lasted 10 years or longer
5. You are unmarried
6. You are age 62 or older
7. The benefit you are entitled to receive based on your own work is less than the benefits you would receive on your ex’s work

If your ex-spouse is deceased, you can receive benefits, but the circumstances are very limited.  I would suggest to discuss your options with an attorney due to the limited circumstances that apply in this situation.