165618012 has 48 divisors (see below), whose sum is σ = 467631360. Its totient is φ = 44535552.

The previous prime is 165618007. The next prime is 165618017. The reversal of 165618012 is 210816561.

It is an interprime number because it is at equal distance from previous prime (165618007) and next prime (165618017).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165618017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56562 + ... + 59417.

It is an arithmetic number, because the mean of its divisors is an integer number (9742320).

Almost surely, 2^165618012 is an apocalyptic number.

165618012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165618012 is an abundant number, since it is smaller than the sum of its proper divisors (302013348).

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

165618012 is a wasteful number, since it uses less digits than its factorization.

165618012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116010 (or 116008 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 165618012 is about 12869.2661795457. The cubic root of 165618012 is about 549.1645851442.

The spelling of 165618012 in words is "one hundred sixty-five million, six hundred eighteen thousand, twelve".