What's the race of Invincible's father?

The race of Invincible's father is Viltrumite. The Viltrumites are a powerful and dominant alien race known for their superior strength, agility, and longevity. They possess various superhuman abilities, making them formidable beings. As Invincible's father, also known as Omni-Man, is a Viltrumite, he passes on his exceptional powers and abilities to his son, Mark Grayson, who becomes the superhero known as Invincible.