165568140 has 36 divisors (see below), whose sum is σ = 502223904. Its totient is φ = 44151456.

The previous prime is 165568133. The next prime is 165568141. The reversal of 165568140 is 41865561.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 165568095 and 165568104.

It is not an unprimeable number, because it can be changed into a prime (165568141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459732 + ... + 460091.

It is an arithmetic number, because the mean of its divisors is an integer number (13950664).

Almost surely, 2^165568140 is an apocalyptic number.

165568140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165568140 is an abundant number, since it is smaller than the sum of its proper divisors (336655764).

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

165568140 is a wasteful number, since it uses less digits than its factorization.

165568140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919838 (or 919833 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 165568140 is about 12867.3283940374. The cubic root of 165568140 is about 549.1094569099.

The spelling of 165568140 in words is "one hundred sixty-five million, five hundred sixty-eight thousand, one hundred forty".