It is a weak prime.
It is a cyclic number.
Almost surely, 225545355615601 is an apocalyptic number.
It is an amenable number.
25545355615601 is an equidigital number, since it uses as much as digits as its factorization.
25545355615601 is an odious number, because the sum of its binary digits is odd.
The spelling of 25545355615601 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred fifteen thousand, six hundred one".