118396161 has 63 divisors (see below), whose sum is σ = 198618867. Its totient is φ = 70508880.

The previous prime is 118396147. The next prime is 118396193. The reversal of 118396161 is 161693811.

It is a happy number.

The square root of 118396161 is 10881.

It is a perfect power (a square), and thus also a powerful number.

118396161 is a `hidden beast` number, since 1 + 1 + 8 + 39 + 616 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 100881936 = 4185^2 + 10044^2 .

It is not a de Polignac number, because 118396161 - 2⁹ = 118395649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118396141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 3819216 + ... + 3819246.

Almost surely, 2^118396161 is an apocalyptic number.

118396161 is the 10881-st square number.

118396161 is the 5441-st centered octagonal number.

It is an amenable number.

118396161 is a deficient number, since it is larger than the sum of its proper divisors (80222706).

118396161 is an frugal number, since it uses more digits than its factorization.

118396161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 47 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The cubic root of 118396161 is about 491.0351032570.

Multiplying 118396161 by its sum of digits (36), we get a square (4262261796 = 65286²).

It can be divided in two parts, 1183 and 96161, that added together give a square (97344 = 312²).

The spelling of 118396161 in words is "one hundred eighteen million, three hundred ninety-six thousand, one hundred sixty-one".