6858642617 has 2 divisors, whose sum is σ = 6858642618. Its totient is φ = 6858642616.

The previous prime is 6858642611. The next prime is 6858642701. The reversal of 6858642617 is 7162468586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6734007721 + 124634896 = 82061^2 + 11164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6858642617 is a prime.

It is not a weakly prime, because it can be changed into another prime (6858642611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3429321308 + 3429321309.

It is an arithmetic number, because the mean of its divisors is an integer number (3429321309).

Almost surely, 2^6858642617 is an apocalyptic number.

It is an amenable number.

6858642617 is a deficient number, since it is larger than the sum of its proper divisors (1).

6858642617 is an equidigital number, since it uses as much as digits as its factorization.

6858642617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 53.

The square root of 6858642617 is about 82816.9222864506. The cubic root of 6858642617 is about 1899.9670000732.

The spelling of 6858642617 in words is "six billion, eight hundred fifty-eight million, six hundred forty-two thousand, six hundred seventeen".