165628804817 has 16 divisors (see below), whose sum is σ = 192941066880. Its totient is φ = 139231502592.

The previous prime is 165628804793. The next prime is 165628804843. The reversal of 165628804817 is 718408826561.

It is not a de Polignac number, because 165628804817 - 2⁶ = 165628804753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165628804877) 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, 821513 + ... + 1003065.

It is an arithmetic number, because the mean of its divisors is an integer number (12058816680).

Almost surely, 2^165628804817 is an apocalyptic number.

It is an amenable number.

165628804817 is a deficient number, since it is larger than the sum of its proper divisors (27312262063).

165628804817 is a wasteful number, since it uses less digits than its factorization.

165628804817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184072.

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 165628804817 in words is "one hundred sixty-five billion, six hundred twenty-eight million, eight hundred four thousand, eight hundred seventeen".