165243960 has 192 divisors, whose sum is σ = 640673280. Its totient is φ = 36115200.

The previous prime is 165243959. The next prime is 165243973. The reversal of 165243960 is 69342561.

It is a happy number.

165243960 is a `hidden beast` number, since 165 + 2 + 439 + 60 = 666.

165243960 is digitally balanced in base 2 and base 3, because in such bases 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 an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56535 + ... + 59385.

It is an arithmetic number, because the mean of its divisors is an integer number (3336840).

Almost surely, 2^165243960 is an apocalyptic number.

165243960 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 165243960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320336640).

165243960 is an abundant number, since it is smaller than the sum of its proper divisors (475429320).

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

165243960 is a wasteful number, since it uses less digits than its factorization.

165243960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2891 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 165243960 is about 12854.7252012635. The cubic root of 165243960 is about 548.7508399867.

The spelling of 165243960 in words is "one hundred sixty-five million, two hundred forty-three thousand, nine hundred sixty".