856160181 has 6 divisors (see below), whose sum is σ = 1236675830. Its totient is φ = 570773448.

The previous prime is 856160177. The next prime is 856160191. The reversal of 856160181 is 181061658.

It can be written as a sum of positive squares in only one way, i.e., 601917156 + 254243025 = 24534^2 + 15945^2 .

It is not a de Polignac number, because 856160181 - 2² = 856160177 is a prime.

It is a super-2 number, since 2×856160181² = 1466020511059905522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856160111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47564446 + ... + 47564463.

Almost surely, 2^856160181 is an apocalyptic number.

It is an amenable number.

856160181 is a deficient number, since it is larger than the sum of its proper divisors (380515649).

856160181 is a wasteful number, since it uses less digits than its factorization.

856160181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95128915 (or 95128912 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 856160181 is about 29260.2149855397. The cubic root of 856160181 is about 949.5511013063.

The spelling of 856160181 in words is "eight hundred fifty-six million, one hundred sixty thousand, one hundred eighty-one".