855317617 has 32 divisors (see below), whose sum is σ = 1145124864. Its totient is φ = 618374400.

The previous prime is 855317599. The next prime is 855317627. The reversal of 855317617 is 716713558.

It is a de Polignac number, because none of the positive numbers 2^k-855317617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855317627) 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 in 31 ways as a sum of consecutive naturals, for example, 88338 + ... + 97540.

It is an arithmetic number, because the mean of its divisors is an integer number (35785152).

Almost surely, 2^855317617 is an apocalyptic number.

It is an amenable number.

855317617 is a deficient number, since it is larger than the sum of its proper divisors (289807247).

855317617 is a wasteful number, since it uses less digits than its factorization.

855317617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9309.

The product of its digits is 176400, while the sum is 43.

The square root of 855317617 is about 29245.8136662326. The cubic root of 855317617 is about 949.2395084579.

The spelling of 855317617 in words is "eight hundred fifty-five million, three hundred seventeen thousand, six hundred seventeen".