165944568834 has 32 divisors (see below), whose sum is σ = 402289865280. Its totient is φ = 50286232800.

The previous prime is 165944568799. The next prime is 165944568883. The reversal of 165944568834 is 438865449561.

165944568834 is a `hidden beast` number, since 1 + 6 + 59 + 445 + 68 + 83 + 4 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 139683387 + ... + 139684574.

It is an arithmetic number, because the mean of its divisors is an integer number (12571558290).

Almost surely, 2^165944568834 is an apocalyptic number.

165944568834 is an abundant number, since it is smaller than the sum of its proper divisors (236345296446).

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

165944568834 is a wasteful number, since it uses less digits than its factorization.

165944568834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279367983 (or 279367977 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 63.

The spelling of 165944568834 in words is "one hundred sixty-five billion, nine hundred forty-four million, five hundred sixty-eight thousand, eight hundred thirty-four".