856357845 has 32 divisors (see below), whose sum is σ = 1569220608. Its totient is φ = 390650688.

The previous prime is 856357841. The next prime is 856357861. The reversal of 856357845 is 548753658.

It is a happy number.

It is not a de Polignac number, because 856357845 - 2² = 856357841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856357841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42762 + ... + 59508.

It is an arithmetic number, because the mean of its divisors is an integer number (49038144).

Almost surely, 2^856357845 is an apocalyptic number.

It is an amenable number.

856357845 is a deficient number, since it is larger than the sum of its proper divisors (712862763).

856357845 is a wasteful number, since it uses less digits than its factorization.

856357845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17249.

The product of its digits is 4032000, while the sum is 51.

The square root of 856357845 is about 29263.5924828104. The cubic root of 856357845 is about 949.6241708209.

The spelling of 856357845 in words is "eight hundred fifty-six million, three hundred fifty-seven thousand, eight hundred forty-five".