16640409084941 has 2 divisors, whose sum is σ = 16640409084942. Its totient is φ = 16640409084940.

The previous prime is 16640409084917. The next prime is 16640409085021. The reversal of 16640409084941 is 14948090404661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10928452484041 + 5711956600900 = 3305821^2 + 2389970^2 .

It is an emirp because it is prime and its reverse (14948090404661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16640409084941 - 2⁶ = 16640409084877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16640409080941) 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, 8320204542470 + 8320204542471.

It is an arithmetic number, because the mean of its divisors is an integer number (8320204542471).

Almost surely, 2^{16640409084941} is an apocalyptic number.

It is an amenable number.

16640409084941 is a deficient number, since it is larger than the sum of its proper divisors (1).

16640409084941 is an equidigital number, since it uses as much as digits as its factorization.

16640409084941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 16640409084941 in words is "sixteen trillion, six hundred forty billion, four hundred nine million, eighty-four thousand, nine hundred forty-one".