6855864443 has 2 divisors, whose sum is σ = 6855864444. Its totient is φ = 6855864442.

The previous prime is 6855864419. The next prime is 6855864461. The reversal of 6855864443 is 3444685586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6855864443 - 2³² = 2560897147 is a prime.

It is not a weakly prime, because it can be changed into another prime (6855864493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3427932221 + 3427932222.

It is an arithmetic number, because the mean of its divisors is an integer number (3427932222).

Almost surely, 2^6855864443 is an apocalyptic number.

6855864443 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855864443 is an equidigital number, since it uses as much as digits as its factorization.

6855864443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11059200, while the sum is 53.

The square root of 6855864443 is about 82800.1476025254. The cubic root of 6855864443 is about 1899.7104307551.

The spelling of 6855864443 in words is "six billion, eight hundred fifty-five million, eight hundred sixty-four thousand, four hundred forty-three".