6859851728399 has 2 divisors, whose sum is σ = 6859851728400. Its totient is φ = 6859851728398.

The previous prime is 6859851728329. The next prime is 6859851728413. The reversal of 6859851728399 is 9938271589586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6859851728399 - 2²⁰ = 6859850679823 is a prime.

It is a super-3 number, since 3×6859851728399³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6859851728329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3429925864199 + 3429925864200.

It is an arithmetic number, because the mean of its divisors is an integer number (3429925864200).

Almost surely, 2^{6859851728399} is an apocalyptic number.

6859851728399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6859851728399 is an equidigital number, since it uses as much as digits as its factorization.

6859851728399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2351462400, while the sum is 80.

The spelling of 6859851728399 in words is "six trillion, eight hundred fifty-nine billion, eight hundred fifty-one million, seven hundred twenty-eight thousand, three hundred ninety-nine".