165312633546331 has 32 divisors (see below), whose sum is σ = 169127972939520. Its totient is φ = 161524881383424.

The previous prime is 165312633546323. The next prime is 165312633546343. The reversal of 165312633546331 is 133645336213561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 165312633546331 - 2³ = 165312633546323 is a prime.

It is a super-2 number, since 2×165312633546331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165312633546371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28004847726 + ... + 28004853628.

It is an arithmetic number, because the mean of its divisors is an integer number (5285249154360).

Almost surely, 2^{165312633546331} is an apocalyptic number.

165312633546331 is a deficient number, since it is larger than the sum of its proper divisors (3815339393189).

165312633546331 is a wasteful number, since it uses less digits than its factorization.

165312633546331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535.

The product of its digits is 10497600, while the sum is 52.

Adding to 165312633546331 its reverse (133645336213561), we get a palindrome (298957969759892).

The spelling of 165312633546331 in words is "one hundred sixty-five trillion, three hundred twelve billion, six hundred thirty-three million, five hundred forty-six thousand, three hundred thirty-one".