It is a tau number, because it is divible by the number of its divisors (480).
It is a congruent number.
It is an unprimeable number.
Almost surely, 2165158400 is an apocalyptic number.
165158400 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 165158400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328800384).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
165158400 is a wasteful number, since it uses less digits than its factorization.
165158400 is an evil number, because the sum of its binary digits is even.
The square root of 165158400 is about 12851.3968112420. The cubic root of 165158400 is about 548.6561129185.
The spelling of 165158400 in words is "one hundred sixty-five million, one hundred fifty-eight thousand, four hundred".