165163503424 has 112 divisors (see below), whose sum is σ = 346728775680. Its totient is φ = 77901626880.

The previous prime is 165163503403. The next prime is 165163503431. The reversal of 165163503424 is 424305361561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112279009 + ... + 112280479.

It is an arithmetic number, because the mean of its divisors is an integer number (3095792640).

Almost surely, 2^165163503424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165163503424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173364387840).

165163503424 is an abundant number, since it is smaller than the sum of its proper divisors (181565272256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165163503424 is a wasteful number, since it uses less digits than its factorization.

165163503424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508 (or 2498 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 165163503424 its reverse (424305361561), we get a palindrome (589468864985).

The spelling of 165163503424 in words is "one hundred sixty-five billion, one hundred sixty-three million, five hundred three thousand, four hundred twenty-four".