165356400 has 120 divisors (see below), whose sum is σ = 577891584. Its totient is φ = 40083200.

The previous prime is 165356383. The next prime is 165356419. The reversal of 165356400 is 4653561.

165356400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6937 + ... + 19463.

Almost surely, 2^165356400 is an apocalyptic number.

165356400 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 165356400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288945792).

165356400 is an abundant number, since it is smaller than the sum of its proper divisors (412535184).

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

165356400 is a wasteful number, since it uses less digits than its factorization.

165356400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12559 (or 12548 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 165356400 is about 12859.0979465902. The cubic root of 165356400 is about 548.8752773234.

The spelling of 165356400 in words is "one hundred sixty-five million, three hundred fifty-six thousand, four hundred".