255601161 has 6 divisors (see below), whose sum is σ = 369201690. Its totient is φ = 170400768.

The previous prime is 255601117. The next prime is 255601183. The reversal of 255601161 is 161106552.

It is a happy number.

255601161 is a `hidden beast` number, since 2 + 55 + 601 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 160655625 + 94945536 = 12675^2 + 9744^2 .

It is not a de Polignac number, because 255601161 - 2⁶ = 255601097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255641161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14200056 + ... + 14200073.

It is an arithmetic number, because the mean of its divisors is an integer number (61533615).

Almost surely, 2^255601161 is an apocalyptic number.

It is an amenable number.

255601161 is a deficient number, since it is larger than the sum of its proper divisors (113600529).

255601161 is a wasteful number, since it uses less digits than its factorization.

255601161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28400135 (or 28400132 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 255601161 is about 15987.5314229558. The cubic root of 255601161 is about 634.6305007224.

The spelling of 255601161 in words is "two hundred fifty-five million, six hundred one thousand, one hundred sixty-one".