6418967689 has 2 divisors, whose sum is σ = 6418967690. Its totient is φ = 6418967688.

The previous prime is 6418967669. The next prime is 6418967693. The reversal of 6418967689 is 9867698146.

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., 4451158089 + 1967809600 = 66717^2 + 44360^2 .

It is a cyclic number.

It is not a de Polignac number, because 6418967689 - 2¹³ = 6418959497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6418967689.

It is not a weakly prime, because it can be changed into another prime (6418967609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209483844 + 3209483845.

It is an arithmetic number, because the mean of its divisors is an integer number (3209483845).

Almost surely, 2^6418967689 is an apocalyptic number.

It is an amenable number.

6418967689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6418967689 is an equidigital number, since it uses as much as digits as its factorization.

6418967689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 64.

The square root of 6418967689 is about 80118.4603509079. The cubic root of 6418967689 is about 1858.4678955579.

The spelling of 6418967689 in words is "six billion, four hundred eighteen million, nine hundred sixty-seven thousand, six hundred eighty-nine".