165253680 has 60 divisors (see below), whose sum is σ = 554979360. Its totient is φ = 44067456.

The previous prime is 165253663. The next prime is 165253703. The reversal of 165253680 is 86352561.

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114040 + ... + 115479.

It is an arithmetic number, because the mean of its divisors is an integer number (9249656).

Almost surely, 2^165253680 is an apocalyptic number.

165253680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165253680 is an abundant number, since it is smaller than the sum of its proper divisors (389725680).

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

165253680 is a wasteful number, since it uses less digits than its factorization.

165253680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229538 (or 229529 counting only the distinct ones).

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

The square root of 165253680 is about 12855.1032667964. The cubic root of 165253680 is about 548.7615993383.

The spelling of 165253680 in words is "one hundred sixty-five million, two hundred fifty-three thousand, six hundred eighty".