11856125165 has 4 divisors (see below), whose sum is σ = 14227350204. Its totient is φ = 9484900128.

The previous prime is 11856125161. The next prime is 11856125189. The reversal of 11856125165 is 56152165811.

It is a happy number.

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 8779315204 + 3076809961 = 93698^2 + 55469^2 .

It is a cyclic number.

It is not a de Polignac number, because 11856125165 - 2² = 11856125161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856125161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185612512 + ... + 1185612521.

It is an arithmetic number, because the mean of its divisors is an integer number (3556837551).

Almost surely, 2^11856125165 is an apocalyptic number.

It is an amenable number.

11856125165 is a deficient number, since it is larger than the sum of its proper divisors (2371225039).

11856125165 is an equidigital number, since it uses as much as digits as its factorization.

11856125165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371225038.

The product of its digits is 72000, while the sum is 41.

The spelling of 11856125165 in words is "eleven billion, eight hundred fifty-six million, one hundred twenty-five thousand, one hundred sixty-five".