When God introduces Himself to Abraham, He calls Himself in Hebrew "El-Shaddai," which means "God of the Mountains" or "The Almighty
Now when Abram was ninety-nine years old, the Lord appeared to Abram and said to him, "I am God Almighty
Walk before Me, and be blameless.
I will establish
My covenant between Me and you,
And I will multiply you exceedingly."
God has all encompassing absolute power.
His incomprehensible power of Creation and demonstration of miracles in the Exodus distinguish Him from all other gods
and validate the historical reality of His existence (Deut 4:32-35).
No other God has the power and authority to forgive sin, render judgement of sin and dispense the consequences to
those guilty of sin (Ex 34:6-7).
Only God has the power and ability of paying the price of atonement for the sins of mankind (1 Tim 2:6).
To learn more, see:
God is Omnipotent