165650432 has 56 divisors (see below), whose sum is σ = 337031076. Its totient is φ = 81395712.

The previous prime is 165650423. The next prime is 165650437. The reversal of 165650432 is 234056561.

It can be written as a sum of positive squares in 2 ways, for example, as 162205696 + 3444736 = 12736^2 + 1856^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (165650437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597878 + ... + 598154.

Almost surely, 2^165650432 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 165650432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168515538).

165650432 is an abundant number, since it is smaller than the sum of its proper divisors (171380644).

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

165650432 is an frugal number, since it uses more digits than its factorization.

165650432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 165650432 is about 12870.5257079888. The cubic root of 165650432 is about 549.2004160985.

The spelling of 165650432 in words is "one hundred sixty-five million, six hundred fifty thousand, four hundred thirty-two".