6858224809 has 2 divisors, whose sum is σ = 6858224810. Its totient is φ = 6858224808.

The previous prime is 6858224783. The next prime is 6858224839. The reversal of 6858224809 is 9084228586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6710067225 + 148157584 = 81915^2 + 12172^2 .

It is a cyclic number.

It is not a de Polignac number, because 6858224809 - 2⁵ = 6858224777 is a prime.

It is not a weakly prime, because it can be changed into another prime (6858224839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3429112404 + 3429112405.

It is an arithmetic number, because the mean of its divisors is an integer number (3429112405).

Almost surely, 2^6858224809 is an apocalyptic number.

It is an amenable number.

6858224809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6858224809 is an equidigital number, since it uses as much as digits as its factorization.

6858224809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The square root of 6858224809 is about 82814.3997683978. The cubic root of 6858224809 is about 1899.9284191869.

The spelling of 6858224809 in words is "six billion, eight hundred fifty-eight million, two hundred twenty-four thousand, eight hundred nine".