6436641173 has 2 divisors, whose sum is σ = 6436641174. Its totient is φ = 6436641172.

The previous prime is 6436641091. The next prime is 6436641187. The reversal of 6436641173 is 3711466346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5541015844 + 895625329 = 74438^2 + 29927^2 .

It is a cyclic number.

It is not a de Polignac number, because 6436641173 - 2¹⁰ = 6436640149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6436641173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6436341173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218320586 + 3218320587.

It is an arithmetic number, because the mean of its divisors is an integer number (3218320587).

Almost surely, 2^6436641173 is an apocalyptic number.

It is an amenable number.

6436641173 is a deficient number, since it is larger than the sum of its proper divisors (1).

6436641173 is an equidigital number, since it uses as much as digits as its factorization.

6436641173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 6436641173 is about 80228.6804889623. The cubic root of 6436641173 is about 1860.1719859659.

The spelling of 6436641173 in words is "six billion, four hundred thirty-six million, six hundred forty-one thousand, one hundred seventy-three".