6855363591187 has 2 divisors, whose sum is σ = 6855363591188. Its totient is φ = 6855363591186.

The previous prime is 6855363591091. The next prime is 6855363591203. The reversal of 6855363591187 is 7811953635586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6855363591187 is a prime.

It is not a weakly prime, because it can be changed into another prime (6855363591287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3427681795593 + 3427681795594.

It is an arithmetic number, because the mean of its divisors is an integer number (3427681795594).

Almost surely, 2^{6855363591187} is an apocalyptic number.

6855363591187 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855363591187 is an equidigital number, since it uses as much as digits as its factorization.

6855363591187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296000, while the sum is 67.

The spelling of 6855363591187 in words is "six trillion, eight hundred fifty-five billion, three hundred sixty-three million, five hundred ninety-one thousand, one hundred eighty-seven".