165455280 has 60 divisors (see below), whose sum is σ = 555656400. Its totient is φ = 44121216.

The previous prime is 165455263. The next prime is 165455291. The reversal of 165455280 is 82554561.

165455280 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 (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114180 + ... + 115619.

It is an arithmetic number, because the mean of its divisors is an integer number (9260940).

Almost surely, 2^165455280 is an apocalyptic number.

165455280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165455280 is an abundant number, since it is smaller than the sum of its proper divisors (390201120).

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

165455280 is a wasteful number, since it uses less digits than its factorization.

165455280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229818 (or 229809 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 165455280 is about 12862.9421206814. The cubic root of 165455280 is about 548.9846612016.

The spelling of 165455280 in words is "one hundred sixty-five million, four hundred fifty-five thousand, two hundred eighty".