6855871727 has 2 divisors, whose sum is σ = 6855871728. Its totient is φ = 6855871726.

The previous prime is 6855871709. The next prime is 6855871733. The reversal of 6855871727 is 7271785586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6855871727 - 2¹² = 6855867631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6855871777) 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, 3427935863 + 3427935864.

It is an arithmetic number, because the mean of its divisors is an integer number (3427935864).

Almost surely, 2^6855871727 is an apocalyptic number.

6855871727 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855871727 is an equidigital number, since it uses as much as digits as its factorization.

6855871727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6585600, while the sum is 56.

The square root of 6855871727 is about 82800.1915879426. The cubic root of 6855871727 is about 1899.7111035361.

The spelling of 6855871727 in words is "six billion, eight hundred fifty-five million, eight hundred seventy-one thousand, seven hundred twenty-seven".