165456549 has 12 divisors (see below), whose sum is σ = 249384096. Its totient is φ = 105508392.

The previous prime is 165456547. The next prime is 165456559. The reversal of 165456549 is 945654561.

165456549 is a `hidden beast` number, since 1 + 6 + 54 + 56 + 549 = 666.

It is not a de Polignac number, because 165456549 - 2¹ = 165456547 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165456547) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399447 + ... + 399860.

It is an arithmetic number, because the mean of its divisors is an integer number (20782008).

Almost surely, 2^165456549 is an apocalyptic number.

It is an amenable number.

165456549 is a deficient number, since it is larger than the sum of its proper divisors (83927547).

165456549 is a wasteful number, since it uses less digits than its factorization.

165456549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799336 (or 799333 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 165456549 is about 12862.9914483374. The cubic root of 165456549 is about 548.9860647224.

The spelling of 165456549 in words is "one hundred sixty-five million, four hundred fifty-six thousand, five hundred forty-nine".