16544081 has 2 divisors, whose sum is σ = 16544082. Its totient is φ = 16544080.

The previous prime is 16544071. The next prime is 16544083. The reversal of 16544081 is 18044561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8614225 + 7929856 = 2935^2 + 2816^2 .

It is an emirp because it is prime and its reverse (18044561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16544081 - 2¹⁴ = 16527697 is a prime.

It is a super-2 number, since 2×16544081² = 547413232269122, which contains 22 as substring.

Together with 16544083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16544083) 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, 8272040 + 8272041.

It is an arithmetic number, because the mean of its divisors is an integer number (8272041).

Almost surely, 2^16544081 is an apocalyptic number.

It is an amenable number.

16544081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16544081 is an equidigital number, since it uses as much as digits as its factorization.

16544081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 16544081 is about 4067.4415791748. The cubic root of 16544081 is about 254.8086787393.

The spelling of 16544081 in words is "sixteen million, five hundred forty-four thousand, eighty-one".