857845856331 has 16 divisors (see below), whose sum is σ = 1270920733600. Its totient is φ = 571880145024.

The previous prime is 857845856323. The next prime is 857845856389. The reversal of 857845856331 is 133658548758.

857845856331 is a `hidden beast` number, since 8 + 578 + 4 + 5 + 8 + 56 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 857845856331 - 2³ = 857845856323 is a prime.

It is a super-2 number, since 2×857845856331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857845896331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480255 + ... + 1395111.

It is an arithmetic number, because the mean of its divisors is an integer number (79432545850).

Almost surely, 2^857845856331 is an apocalyptic number.

857845856331 is a deficient number, since it is larger than the sum of its proper divisors (413074877269).

857845856331 is a wasteful number, since it uses less digits than its factorization.

857845856331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949595 (or 949589 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 857845856331 in words is "eight hundred fifty-seven billion, eight hundred forty-five million, eight hundred fifty-six thousand, three hundred thirty-one".