16645361 has 2 divisors, whose sum is σ = 16645362. Its totient is φ = 16645360.

The previous prime is 16645337. The next prime is 16645367. The reversal of 16645361 is 16354661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 323761 = 4040^2 + 569^2 .

It is an emirp because it is prime and its reverse (16354661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16645361 - 2¹⁰ = 16644337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16645367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322680 + 8322681.

It is an arithmetic number, because the mean of its divisors is an integer number (8322681).

Almost surely, 2^16645361 is an apocalyptic number.

It is an amenable number.

16645361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16645361 is an equidigital number, since it uses as much as digits as its factorization.

16645361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 16645361 is about 4079.8726695817. The cubic root of 16645361 is about 255.3275861624.

The spelling of 16645361 in words is "sixteen million, six hundred forty-five thousand, three hundred sixty-one".