6857959631317 has 2 divisors, whose sum is σ = 6857959631318. Its totient is φ = 6857959631316.

The previous prime is 6857959631291. The next prime is 6857959631389. The reversal of 6857959631317 is 7131369597586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6029229791601 + 828729839716 = 2455449^2 + 910346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6857959631317 is a prime.

It is a super-2 number, since 2×6857959631317² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6857959638317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428979815658 + 3428979815659.

It is an arithmetic number, because the mean of its divisors is an integer number (3428979815659).

Almost surely, 2^{6857959631317} is an apocalyptic number.

It is an amenable number.

6857959631317 is a deficient number, since it is larger than the sum of its proper divisors (1).

6857959631317 is an equidigital number, since it uses as much as digits as its factorization.

6857959631317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 257191200, while the sum is 70.

The spelling of 6857959631317 in words is "six trillion, eight hundred fifty-seven billion, nine hundred fifty-nine million, six hundred thirty-one thousand, three hundred seventeen".