16780064009 has 2 divisors, whose sum is σ = 16780064010. Its totient is φ = 16780064008.

The previous prime is 16780063903. The next prime is 16780064011. The reversal of 16780064009 is 90046008761.

16780064009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10757838400 + 6022225609 = 103720^2 + 77603^2 .

It is a cyclic number.

It is not a de Polignac number, because 16780064009 - 2¹² = 16780059913 is a prime.

It is a super-2 number, since 2×16780064009² (a number of 21 digits) contains 22 as substring.

Together with 16780064011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16780064089) 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, 8390032004 + 8390032005.

It is an arithmetic number, because the mean of its divisors is an integer number (8390032005).

Almost surely, 2^16780064009 is an apocalyptic number.

It is an amenable number.

16780064009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16780064009 is an equidigital number, since it uses as much as digits as its factorization.

16780064009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 16780064009 in words is "sixteen billion, seven hundred eighty million, sixty-four thousand, nine".