It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-16228538662961 is a prime.
It is a Duffinian number.
Almost surely, 216228538662961 is an apocalyptic number.
It is an amenable number.
16228538662961 is an equidigital number, since it uses as much as digits as its factorization.
16228538662961 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 438609153090.
The spelling of 16228538662961 in words is "sixteen trillion, two hundred twenty-eight billion, five hundred thirty-eight million, six hundred sixty-two thousand, nine hundred sixty-one".