6851278456239 has 24 divisors (see below), whose sum is σ = 10687897445040. Its totient is φ = 3892386094464.

The previous prime is 6851278456223. The next prime is 6851278456249. The reversal of 6851278456239 is 9326548721586.

It is not a de Polignac number, because 6851278456239 - 2⁴ = 6851278456223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6851278456239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6851278456249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134677854 + ... + 134728715.

It is an arithmetic number, because the mean of its divisors is an integer number (445329060210).

Almost surely, 2^{6851278456239} is an apocalyptic number.

6851278456239 is a deficient number, since it is larger than the sum of its proper divisors (3836618988801).

6851278456239 is a wasteful number, since it uses less digits than its factorization.

6851278456239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269406759 (or 269406752 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 66.

The spelling of 6851278456239 in words is "six trillion, eight hundred fifty-one billion, two hundred seventy-eight million, four hundred fifty-six thousand, two hundred thirty-nine".