16346409689 has 2 divisors, whose sum is σ = 16346409690. Its totient is φ = 16346409688.

The previous prime is 16346409659. The next prime is 16346409691. The reversal of 16346409689 is 98690464361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13485015625 + 2861394064 = 116125^2 + 53492^2 .

It is a cyclic number.

It is not a de Polignac number, because 16346409689 - 2³² = 12051442393 is a prime.

Together with 16346409691, 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 (16346409659) 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, 8173204844 + 8173204845.

It is an arithmetic number, because the mean of its divisors is an integer number (8173204845).

Almost surely, 2^16346409689 is an apocalyptic number.

It is an amenable number.

16346409689 is a deficient number, since it is larger than the sum of its proper divisors (1).

16346409689 is an equidigital number, since it uses as much as digits as its factorization.

16346409689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 16346409689 in words is "sixteen billion, three hundred forty-six million, four hundred nine thousand, six hundred eighty-nine".