165356280 has 192 divisors, whose sum is σ = 583783200. Its totient is φ = 40427520.

The previous prime is 165356267. The next prime is 165356281. The reversal of 165356280 is 82653561.

165356280 is a `hidden beast` number, since 16 + 5 + 3 + 562 + 80 = 666.

165356280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165356281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 250591 + ... + 251249.

Almost surely, 2^165356280 is an apocalyptic number.

165356280 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 165356280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291891600).

165356280 is an abundant number, since it is smaller than the sum of its proper divisors (418426920).

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

165356280 is a wasteful number, since it uses less digits than its factorization.

165356280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 165356280 is about 12859.0932806322. The cubic root of 165356280 is about 548.8751445495.

The spelling of 165356280 in words is "one hundred sixty-five million, three hundred fifty-six thousand, two hundred eighty".