16365649 has 2 divisors, whose sum is σ = 16365650. Its totient is φ = 16365648.

The previous prime is 16365617. The next prime is 16365653. The reversal of 16365649 is 94656361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14961424 + 1404225 = 3868^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 16365649 - 2⁵ = 16365617 is a prime.

It is not a weakly prime, because it can be changed into another prime (16365659) 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, 8182824 + 8182825.

It is an arithmetic number, because the mean of its divisors is an integer number (8182825).

Almost surely, 2^16365649 is an apocalyptic number.

It is an amenable number.

16365649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16365649 is an equidigital number, since it uses as much as digits as its factorization.

16365649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The square root of 16365649 is about 4045.4479356432. The cubic root of 16365649 is about 253.8893073795.

The spelling of 16365649 in words is "sixteen million, three hundred sixty-five thousand, six hundred forty-nine".