856327681 has 16 divisors (see below), whose sum is σ = 962067456. Its totient is φ = 755440000.

The previous prime is 856327669. The next prime is 856327721. The reversal of 856327681 is 186723658.

It is a cyclic number.

It is not a de Polignac number, because 856327681 - 2⁵ = 856327649 is a prime.

It is a super-2 number, since 2×856327681² = 1466594194493675522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856327181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81171 + ... + 91111.

It is an arithmetic number, because the mean of its divisors is an integer number (60129216).

Almost surely, 2^856327681 is an apocalyptic number.

It is an amenable number.

856327681 is a deficient number, since it is larger than the sum of its proper divisors (105739775).

856327681 is a wasteful number, since it uses less digits than its factorization.

856327681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184.

The product of its digits is 483840, while the sum is 46.

The square root of 856327681 is about 29263.0770938396. The cubic root of 856327681 is about 949.6130209649.

The spelling of 856327681 in words is "eight hundred fifty-six million, three hundred twenty-seven thousand, six hundred eighty-one".