6416806789 has 4 divisors (see below), whose sum is σ = 6417042124. Its totient is φ = 6416571456.

The previous prime is 6416806769. The next prime is 6416806793. The reversal of 6416806789 is 9876086146.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1934504289 + 4482302500 = 43983^2 + 66950^2 .

It is a cyclic number.

It is not a de Polignac number, because 6416806789 - 2⁷ = 6416806661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6416806769) 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 in 3 ways as a sum of consecutive naturals, for example, 70452 + ... + 133405.

It is an arithmetic number, because the mean of its divisors is an integer number (1604260531).

Almost surely, 2^6416806789 is an apocalyptic number.

It is an amenable number.

6416806789 is a deficient number, since it is larger than the sum of its proper divisors (235335).

6416806789 is a wasteful number, since it uses less digits than its factorization.

6416806789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235334.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 6416806789 is about 80104.9735596985. The cubic root of 6416806789 is about 1858.2593254678.

The spelling of 6416806789 in words is "six billion, four hundred sixteen million, eight hundred six thousand, seven hundred eighty-nine".