6816847841 has 4 divisors (see below), whose sum is σ = 6860267412. Its totient is φ = 6773428272.

The previous prime is 6816847823. The next prime is 6816847859. The reversal of 6816847841 is 1487486186.

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

It is an interprime number because it is at equal distance from previous prime (6816847823) and next prime (6816847859).

It can be written as a sum of positive squares in 2 ways, for example, as 4342282816 + 2474565025 = 65896^2 + 49745^2 .

It is a cyclic number.

It is not a de Polignac number, because 6816847841 - 2¹⁸ = 6816585697 is a prime.

It is a super-2 number, since 2×6816847841² = 92938828974692722562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6816847861) 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 in 3 ways as a sum of consecutive naturals, for example, 21709550 + ... + 21709863.

It is an arithmetic number, because the mean of its divisors is an integer number (1715066853).

Almost surely, 2^6816847841 is an apocalyptic number.

It is an amenable number.

6816847841 is a deficient number, since it is larger than the sum of its proper divisors (43419571).

6816847841 is a wasteful number, since it uses less digits than its factorization.

6816847841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43419570.

The product of its digits is 2064384, while the sum is 53.

The square root of 6816847841 is about 82564.2043563674. The cubic root of 6816847841 is about 1896.0998334183.

The spelling of 6816847841 in words is "six billion, eight hundred sixteen million, eight hundred forty-seven thousand, eight hundred forty-one".