857648433917 has 8 divisors (see below), whose sum is σ = 940464229440. Its totient is φ = 775640597760.

The previous prime is 857648433899. The next prime is 857648433937. The reversal of 857648433917 is 719334846758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 857648433917 - 2¹² = 857648429821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857648433937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201987617 + ... + 201991862.

It is an arithmetic number, because the mean of its divisors is an integer number (117558028680).

Almost surely, 2^857648433917 is an apocalyptic number.

It is an amenable number.

857648433917 is a deficient number, since it is larger than the sum of its proper divisors (82815795523).

857648433917 is a wasteful number, since it uses less digits than its factorization.

857648433917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403979683.

The product of its digits is 121927680, while the sum is 65.

The spelling of 857648433917 in words is "eight hundred fifty-seven billion, six hundred forty-eight million, four hundred thirty-three thousand, nine hundred seventeen".