No, humans cannot survive on a planet the size of the Sun. The Sun is a massive, hot, and gaseous object that primarily consists of hydrogen and helium. It is classified as a G-type main-sequence star and has a diameter about 109 times that of Earth.
The extreme conditions found on the Sun, such as incredibly high temperatures, intense radiation, and immense gravitational forces, make it completely inhospitable for human life. The surface temperature of the Sun is around 5,500 degrees Celsius (9,932 degrees Fahrenheit), which is far beyond what any known life form can withstand. Additionally, the Sun emits intense ultraviolet radiation and other forms of high-energy radiation that would be lethal to humans.
Furthermore, the immense mass and gravitational pull of the Sun would be crushing. The gravity on the surface of a Sun-sized planet would be many times stronger than Earth's gravity, making it impossible for humans to survive or even stand under such extreme conditions.
Therefore, due to the extreme heat, radiation, and gravitational forces, humans cannot survive on a planet the size of the Sun.