6851791939019 has 2 divisors, whose sum is σ = 6851791939020. Its totient is φ = 6851791939018.

The previous prime is 6851791938961. The next prime is 6851791939063. The reversal of 6851791939019 is 9109391971586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6851791939019 - 2²⁰ = 6851790890443 is a prime.

It is a super-2 number, since 2×6851791939019² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6851791939019.

It is not a weakly prime, because it can be changed into another prime (6851791939099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3425895969509 + 3425895969510.

It is an arithmetic number, because the mean of its divisors is an integer number (3425895969510).

Almost surely, 2^{6851791939019} is an apocalyptic number.

6851791939019 is a deficient number, since it is larger than the sum of its proper divisors (1).

6851791939019 is an equidigital number, since it uses as much as digits as its factorization.

6851791939019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33067440, while the sum is 68.

The spelling of 6851791939019 in words is "six trillion, eight hundred fifty-one billion, seven hundred ninety-one million, nine hundred thirty-nine thousand, nineteen".