165115566010220 has 72 divisors (see below), whose sum is σ = 403360333343856. Its totient is φ = 56610125798016.

The previous prime is 165115566010201. The next prime is 165115566010273. The reversal of 165115566010220 is 22010665511561.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59999267 + ... + 62690853.

It is an arithmetic number, because the mean of its divisors is an integer number (5602226851998).

Almost surely, 2^{165115566010220} is an apocalyptic number.

165115566010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165115566010220 is an abundant number, since it is smaller than the sum of its proper divisors (238244767333636).

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

165115566010220 is a wasteful number, since it uses less digits than its factorization.

165115566010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754207 (or 2754198 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 165115566010220 in words is "one hundred sixty-five trillion, one hundred fifteen billion, five hundred sixty-six million, ten thousand, two hundred twenty".