6857513235917 has 2 divisors, whose sum is σ = 6857513235918. Its totient is φ = 6857513235916.

The previous prime is 6857513235791. The next prime is 6857513235919. The reversal of 6857513235917 is 7195323157586.

Together with previous prime (6857513235791) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6375392702116 + 482120533801 = 2524954^2 + 694349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6857513235917 is a prime.

Together with 6857513235919, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6857513235917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6857513235919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428756617958 + 3428756617959.

It is an arithmetic number, because the mean of its divisors is an integer number (3428756617959).

Almost surely, 2^{6857513235917} is an apocalyptic number.

It is an amenable number.

6857513235917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6857513235917 is an equidigital number, since it uses as much as digits as its factorization.

6857513235917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628000, while the sum is 62.

The spelling of 6857513235917 in words is "six trillion, eight hundred fifty-seven billion, five hundred thirteen million, two hundred thirty-five thousand, nine hundred seventeen".