16228538662993 has 2 divisors, whose sum is σ = 16228538662994. Its totient is φ = 16228538662992.

The previous prime is 16228538662939. The next prime is 16228538662997. The reversal of 16228538662993 is 39926683582261.

Together with previous prime (16228538662939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13956971225409 + 2271567437584 = 3735903^2 + 1507172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16228538662993 is a prime.

It is not a weakly prime, because it can be changed into another prime (16228538662997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8114269331496 + 8114269331497.

It is an arithmetic number, because the mean of its divisors is an integer number (8114269331497).

Almost surely, 2^{16228538662993} is an apocalyptic number.

It is an amenable number.

16228538662993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16228538662993 is an equidigital number, since it uses as much as digits as its factorization.

16228538662993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403107840, while the sum is 70.

The spelling of 16228538662993 in words is "sixteen trillion, two hundred twenty-eight billion, five hundred thirty-eight million, six hundred sixty-two thousand, nine hundred ninety-three".