The answer is: 180

Gen 35:28-29

Isaac, the long-awaited son of Abraham and Sarah, lived a remarkable life lasting 180 years, as noted in Genesis 35:28-29. This figure not only highlights the extended lifespans of biblical figures but also underscores a sense of divine blessing and fulfillment. Isaac's life unfolded with significant events: the trials and triumphs of his own father, Abraham, and his lesser-known role in the continuity of God's covenant.

Isaac isn’t just a historical figure; he represents themes of hope, patience, and legacy. His life's journey also parallels the story of the nation of Israel. Did you know he married Rebekah when he was about 40 and continued to live during from the time of Abraham's death to practically the full early life of Jacob and Esau? Rebekah was integral in Isaac's life, fiercely showing love and unwavering devotion, proving that the family structure around Isaac played pivotal roles in the narrative.

In biblical numerology, 180 can charm curiosity—it’s divisible by 60, a number symbolizing completeness in Hebrew tradition. Signs of divine favor often point to the larger attribute of blessing that spans generations.

Taking a broader lens, Isaac consistently reminds us of the enduring promise that carried his lineage through both joyful and challenging seasons, shaping the course of biblical history leading to the very notion of legacy we consider even today. Through him, we can see that while individual charismas dazzle momentarily, faith and lineage stitch a comprehensive quilt of divine intent and promise.