118135161 has 9 divisors (see below), whose sum is σ = 170686789.
Its totient is φ = 78735036.
The previous prime is 118135081. The next prime is 118135163. The reversal of 118135161 is 161531811.
It is a happy number.
The square root of 118135161 is 10869.
It is a perfect power (a square), and thus also a powerful number.
It is a tau number, because it is divible by the number of its divisors (9).
It is not a de Polignac number, because 118135161 - 27 = 118135033 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (118135163) by changing a digit.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30796 + ... + 34418.
Almost surely, 2118135161 is an apocalyptic number.
118135161 is the 10869-th square number.
118135161 is the 5435-th centered octagonal number.
It is an amenable number.
118135161 is a deficient number, since it is larger than the sum of its proper divisors (52551628).
118135161 is an frugal number, since it uses more digits than its factorization.
118135161 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7252 (or 3626 counting only the distinct ones).
The product of its digits is 720, while the sum is 27.
The cubic root of 118135161 is about 490.6740148254.
Adding to 118135161 its reverse (161531811), we get a palindrome (279666972).
The spelling of 118135161 in words is "one hundred eighteen million, one hundred thirty-five thousand, one hundred sixty-one".