165610500536220 has 48 divisors (see below), whose sum is σ = 466662964594848. Its totient is φ = 43881508419840.

The previous prime is 165610500536209. The next prime is 165610500536251. The reversal of 165610500536220 is 22635005016561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8790356851 + ... + 8790375690.

It is an arithmetic number, because the mean of its divisors is an integer number (9722145095726).

Almost surely, 2^{165610500536220} is an apocalyptic number.

165610500536220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165610500536220 is an abundant number, since it is smaller than the sum of its proper divisors (301052464058628).

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

165610500536220 is a wasteful number, since it uses less digits than its factorization.

165610500536220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17580732710 (or 17580732708 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 165610500536220 in words is "one hundred sixty-five trillion, six hundred ten billion, five hundred million, five hundred thirty-six thousand, two hundred twenty".