16560641 has 2 divisors, whose sum is σ = 16560642. Its totient is φ = 16560640.

The previous prime is 16560631. The next prime is 16560683. The reversal of 16560641 is 14606561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15437041 + 1123600 = 3929^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 16560641 - 2¹⁰ = 16559617 is a prime.

It is not a weakly prime, because it can be changed into another prime (16560611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8280320 + 8280321.

It is an arithmetic number, because the mean of its divisors is an integer number (8280321).

Almost surely, 2^16560641 is an apocalyptic number.

It is an amenable number.

16560641 is a deficient number, since it is larger than the sum of its proper divisors (1).

16560641 is an equidigital number, since it uses as much as digits as its factorization.

16560641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16560641 is about 4069.4767476913. The cubic root of 16560641 is about 254.8936683419.

It can be divided in two parts, 165 and 60641, that added together give a palindrome (60806).

The spelling of 16560641 in words is "sixteen million, five hundred sixty thousand, six hundred forty-one".