165989415252 has 12 divisors (see below), whose sum is σ = 387308635616. Its totient is φ = 55329805080.

The previous prime is 165989415191. The next prime is 165989415269. The reversal of 165989415252 is 252514989561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 165989415192 and 165989415201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6916225624 + ... + 6916225647.

Almost surely, 2^165989415252 is an apocalyptic number.

165989415252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165989415252 is an abundant number, since it is smaller than the sum of its proper divisors (221319220364).

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

165989415252 is a wasteful number, since it uses less digits than its factorization.

165989415252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13832451278 (or 13832451276 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 57.

The spelling of 165989415252 in words is "one hundred sixty-five billion, nine hundred eighty-nine million, four hundred fifteen thousand, two hundred fifty-two".