President Donald Trump says he’s working “long hours” and frequently only gets about four or five hours of sleep a night.

Trump says in an interview with Fox News’ “The O’Reilly Factor” that he typically works until midnight or 1 a.m. He wakes up at 5 a.m. to eat, read newspapers and check out television.

Trump says that at the start of his presidency, he’s been surprised by “the size, the magnitude of everything.” He says being president can be a “surreal experience in a certain way.”

But he adds, “You have to get over it because there’s so much work to be done.”