16780859009 has 2 divisors, whose sum is σ = 16780859010. Its totient is φ = 16780859008.

The previous prime is 16780858987. The next prime is 16780859083. The reversal of 16780859009 is 90095808761.

16780859009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12665251600 + 4115607409 = 112540^2 + 64153^2 .

It is a cyclic number.

It is not a de Polignac number, because 16780859009 - 2⁸ = 16780858753 is a prime.

It is not a weakly prime, because it can be changed into another prime (16780859089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8390429504 + 8390429505.

It is an arithmetic number, because the mean of its divisors is an integer number (8390429505).

Almost surely, 2^16780859009 is an apocalyptic number.

It is an amenable number.

16780859009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16780859009 is an equidigital number, since it uses as much as digits as its factorization.

16780859009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 16780859009 in words is "sixteen billion, seven hundred eighty million, eight hundred fifty-nine thousand, nine".