165782845 has 16 divisors (see below), whose sum is σ = 204063552. Its totient is φ = 129225600.

The previous prime is 165782831. The next prime is 165782849. The reversal of 165782845 is 548287561.

It is not a de Polignac number, because 165782845 - 2⁹ = 165782333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165782795 and 165782804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165782849) 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, 128574 + ... + 129856.

It is an arithmetic number, because the mean of its divisors is an integer number (12753972).

Almost surely, 2^165782845 is an apocalyptic number.

It is an amenable number.

165782845 is a deficient number, since it is larger than the sum of its proper divisors (38280707).

165782845 is a wasteful number, since it uses less digits than its factorization.

165782845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932.

The product of its digits is 537600, while the sum is 46.

The square root of 165782845 is about 12875.6687204976. The cubic root of 165782845 is about 549.3467119373.

It can be divided in two parts, 1657 and 82845, that multiplied together give a triangular number (137274165 = T₁₆₅₆₉).

The spelling of 165782845 in words is "one hundred sixty-five million, seven hundred eighty-two thousand, eight hundred forty-five".