1185136165 has 4 divisors (see below), whose sum is σ = 1422163404. Its totient is φ = 948108928.

The previous prime is 1185136151. The next prime is 1185136207. The reversal of 1185136165 is 5616315811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 927019809 + 258116356 = 30447^2 + 16066^2 .

It is a cyclic number.

It is not a de Polignac number, because 1185136165 - 2¹¹ = 1185134117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118513612 + ... + 118513621.

It is an arithmetic number, because the mean of its divisors is an integer number (355540851).

Almost surely, 2^1185136165 is an apocalyptic number.

It is an amenable number.

1185136165 is a deficient number, since it is larger than the sum of its proper divisors (237027239).

1185136165 is an equidigital number, since it uses as much as digits as its factorization.

1185136165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237027238.

The product of its digits is 21600, while the sum is 37.

The square root of 1185136165 is about 34425.8066717397. The cubic root of 1185136165 is about 1058.2527775226.

The spelling of 1185136165 in words is "one billion, one hundred eighty-five million, one hundred thirty-six thousand, one hundred sixty-five".