16326326281 has 2 divisors, whose sum is σ = 16326326282. Its totient is φ = 16326326280.

The previous prime is 16326326267. The next prime is 16326326383. The reversal of 16326326281 is 18262362361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16234837056 + 91489225 = 127416^2 + 9565^2 .

It is a cyclic number.

It is not a de Polignac number, because 16326326281 - 2⁷ = 16326326153 is a prime.

It is a super-2 number, since 2×16326326281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16326326231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8163163140 + 8163163141.

It is an arithmetic number, because the mean of its divisors is an integer number (8163163141).

Almost surely, 2^16326326281 is an apocalyptic number.

It is an amenable number.

16326326281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16326326281 is an equidigital number, since it uses as much as digits as its factorization.

16326326281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The spelling of 16326326281 in words is "sixteen billion, three hundred twenty-six million, three hundred twenty-six thousand, two hundred eighty-one".