6849872681 has 2 divisors, whose sum is σ = 6849872682. Its totient is φ = 6849872680.

The previous prime is 6849872669. The next prime is 6849872753. The reversal of 6849872681 is 1862789486.

6849872681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3986659600 + 2863213081 = 63140^2 + 53509^2 .

It is a cyclic number.

It is not a de Polignac number, because 6849872681 - 2²² = 6845678377 is a prime.

It is a super-2 number, since 2×6849872681² = 93841511491820255522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6849872681.

It is not a weakly prime, because it can be changed into another prime (6849877681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3424936340 + 3424936341.

It is an arithmetic number, because the mean of its divisors is an integer number (3424936341).

Almost surely, 2^6849872681 is an apocalyptic number.

It is an amenable number.

6849872681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6849872681 is an equidigital number, since it uses as much as digits as its factorization.

6849872681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 59.

The square root of 6849872681 is about 82763.9576204522. The cubic root of 6849872681 is about 1899.1568448207.

The spelling of 6849872681 in words is "six billion, eight hundred forty-nine million, eight hundred seventy-two thousand, six hundred eighty-one".