165120735556 has 48 divisors (see below), whose sum is σ = 332297159040. Its totient is φ = 70326869760.

The previous prime is 165120735553. The next prime is 165120735557. The reversal of 165120735556 is 655537021561.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (165120735553) 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, 2954286 + ... + 3009658.

It is an arithmetic number, because the mean of its divisors is an integer number (6922857480).

Almost surely, 2^165120735556 is an apocalyptic number.

It is an amenable number.

165120735556 is an abundant number, since it is smaller than the sum of its proper divisors (167176423484).

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

165120735556 is a wasteful number, since it uses less digits than its factorization.

165120735556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56044 (or 56042 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 165120735556 in words is "one hundred sixty-five billion, one hundred twenty million, seven hundred thirty-five thousand, five hundred fifty-six".