855136161 has 18 divisors (see below), whose sum is σ = 1357697250. Its totient is φ = 518263680.

The previous prime is 855136153. The next prime is 855136169. The reversal of 855136161 is 161631558.

855136161 is a `hidden beast` number, since 85 + 513 + 6 + 1 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (855136153) and next prime (855136169).

It can be written as a sum of positive squares in only one way, i.e., 753831936 + 101304225 = 27456^2 + 10065^2 .

It is not a de Polignac number, because 855136161 - 2³ = 855136153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855136169) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 391536 + ... + 393713.

It is an arithmetic number, because the mean of its divisors is an integer number (75427625).

Almost surely, 2^855136161 is an apocalyptic number.

It is an amenable number.

855136161 is a deficient number, since it is larger than the sum of its proper divisors (502561089).

855136161 is a wasteful number, since it uses less digits than its factorization.

855136161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785277 (or 785263 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 855136161 is about 29242.7112457104. The cubic root of 855136161 is about 949.1723765204.

The spelling of 855136161 in words is "eight hundred fifty-five million, one hundred thirty-six thousand, one hundred sixty-one".