16021116161 has 2 divisors, whose sum is σ = 16021116162. Its totient is φ = 16021116160.

The previous prime is 16021116121. The next prime is 16021116203. The reversal of 16021116161 is 16161112061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16017433600 + 3682561 = 126560^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 16021116161 - 2²⁶ = 15954007297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16021116161.

It is not a weakly prime, because it can be changed into another prime (16021116101) 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, 8010558080 + 8010558081.

It is an arithmetic number, because the mean of its divisors is an integer number (8010558081).

Almost surely, 2^16021116161 is an apocalyptic number.

It is an amenable number.

16021116161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16021116161 is an equidigital number, since it uses as much as digits as its factorization.

16021116161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 16021116161 in words is "sixteen billion, twenty-one million, one hundred sixteen thousand, one hundred sixty-one".