6541783217 has 2 divisors, whose sum is σ = 6541783218. Its totient is φ = 6541783216.

The previous prime is 6541783189. The next prime is 6541783223. The reversal of 6541783217 is 7123871456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6503454736 + 38328481 = 80644^2 + 6191^2 .

It is a cyclic number.

It is not a de Polignac number, because 6541783217 - 2³⁰ = 5468041393 is a prime.

It is not a weakly prime, because it can be changed into another prime (6541783247) 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, 3270891608 + 3270891609.

It is an arithmetic number, because the mean of its divisors is an integer number (3270891609).

Almost surely, 2^6541783217 is an apocalyptic number.

It is an amenable number.

6541783217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541783217 is an equidigital number, since it uses as much as digits as its factorization.

6541783217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 44.

The square root of 6541783217 is about 80881.2908959792. The cubic root of 6541783217 is about 1870.2459204543.

It can be divided in two parts, 654 and 1783217, that added together give a palindrome (1783871).

The spelling of 6541783217 in words is "six billion, five hundred forty-one million, seven hundred eighty-three thousand, two hundred seventeen".