875638161 has 16 divisors (see below), whose sum is σ = 1365518400. Its totient is φ = 553034304.

The previous prime is 875638157. The next prime is 875638171. The reversal of 875638161 is 161836578.

875638161 is a `hidden beast` number, since 8 + 7 + 5 + 638 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 875638161 - 2² = 875638157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (875638171) 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 15 ways as a sum of consecutive naturals, for example, 852936 + ... + 853961.

It is an arithmetic number, because the mean of its divisors is an integer number (85344900).

Almost surely, 2^875638161 is an apocalyptic number.

It is an amenable number.

875638161 is a deficient number, since it is larger than the sum of its proper divisors (489880239).

875638161 is a wasteful number, since it uses less digits than its factorization.

875638161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706925 (or 1706919 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 875638161 is about 29591.1838391099. The cubic root of 875638161 is about 956.6980602280.

The spelling of 875638161 in words is "eight hundred seventy-five million, six hundred thirty-eight thousand, one hundred sixty-one".