65165565231 has 40 divisors (see below), whose sum is σ = 111001003344. Its totient is φ = 37742941440.

The previous prime is 65165565211. The next prime is 65165565293. The reversal of 65165565231 is 13256556156.

65165565231 is a `hidden beast` number, since 6 + 5 + 1 + 65 + 565 + 23 + 1 = 666.

It is not a de Polignac number, because 65165565231 - 2¹⁰ = 65165564207 is a prime.

It is a super-2 number, since 2×65165565231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65165565211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1802265 + ... + 1838066.

Almost surely, 2^65165565231 is an apocalyptic number.

65165565231 is a deficient number, since it is larger than the sum of its proper divisors (45835438113).

65165565231 is a wasteful number, since it uses less digits than its factorization.

65165565231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640373 (or 3640364 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The spelling of 65165565231 in words is "sixty-five billion, one hundred sixty-five million, five hundred sixty-five thousand, two hundred thirty-one".