165881492 has 12 divisors (see below), whose sum is σ = 331763040. Its totient is φ = 71092056.

The previous prime is 165881483. The next prime is 165881519. The reversal of 165881492 is 294188561.

165881492 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2962142 + ... + 2962197.

It is an arithmetic number, because the mean of its divisors is an integer number (27646920).

Almost surely, 2^165881492 is an apocalyptic number.

It is an amenable number.

165881492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

165881492 is a wasteful number, since it uses less digits than its factorization.

165881492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5924350 (or 5924348 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 165881492 is about 12879.4989032959. The cubic root of 165881492 is about 549.4556509533.

The spelling of 165881492 in words is "one hundred sixty-five million, eight hundred eighty-one thousand, four hundred ninety-two".