165043680 has 96 divisors (see below), whose sum is σ = 533996064. Its totient is φ = 42817536.

The previous prime is 165043679. The next prime is 165043687. The reversal of 165043680 is 86340561.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165043687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13114 + ... + 22406.

It is an arithmetic number, because the mean of its divisors is an integer number (5562459).

Almost surely, 2^165043680 is an apocalyptic number.

165043680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165043680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266998032).

165043680 is an abundant number, since it is smaller than the sum of its proper divisors (368952384).

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

165043680 is a wasteful number, since it uses less digits than its factorization.

165043680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9348 (or 9340 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 165043680 is about 12846.9327078490. The cubic root of 165043680 is about 548.5290502357.

The spelling of 165043680 in words is "one hundred sixty-five million, forty-three thousand, six hundred eighty".