165255837220 has 48 divisors (see below), whose sum is σ = 349620118848. Its totient is φ = 65612050560.

The previous prime is 165255837199. The next prime is 165255837277. The reversal of 165255837220 is 22738552561.

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, 1521567 + ... + 1626553.

It is an arithmetic number, because the mean of its divisors is an integer number (7283752476).

Almost surely, 2^165255837220 is an apocalyptic number.

165255837220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165255837220 is an abundant number, since it is smaller than the sum of its proper divisors (184364281628).

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

165255837220 is a wasteful number, since it uses less digits than its factorization.

165255837220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105580 (or 105578 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 165255837220 in words is "one hundred sixty-five billion, two hundred fifty-five million, eight hundred thirty-seven thousand, two hundred twenty".