165986289732 has 48 divisors (see below), whose sum is σ = 412374836160. Its totient is φ = 51783201792.

The previous prime is 165986289683. The next prime is 165986289787. The reversal of 165986289732 is 237982689561.

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, 2236273 + ... + 2309304.

It is an arithmetic number, because the mean of its divisors is an integer number (8591142420).

Almost surely, 2^165986289732 is an apocalyptic number.

165986289732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165986289732 is an abundant number, since it is smaller than the sum of its proper divisors (246388546428).

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

165986289732 is a wasteful number, since it uses less digits than its factorization.

165986289732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545780 (or 4545778 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 66.

The spelling of 165986289732 in words is "one hundred sixty-five billion, nine hundred eighty-six million, two hundred eighty-nine thousand, seven hundred thirty-two".