328818805709 has 4 divisors (see below), whose sum is σ = 328819983804. Its totient is φ = 328817627616.

The previous prime is 328818805691. The next prime is 328818805729. The reversal of 328818805709 is 907508818823.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 907508818823 = 28109 ⋅32285347.

It can be written as a sum of positive squares in 2 ways, for example, as 67053548809 + 261765256900 = 258947^2 + 511630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328818805709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328818805729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92399 + ... + 816195.

It is an arithmetic number, because the mean of its divisors is an integer number (82204995951).

Almost surely, 2^328818805709 is an apocalyptic number.

It is an amenable number.

328818805709 is a deficient number, since it is larger than the sum of its proper divisors (1178095).

328818805709 is an equidigital number, since it uses as much as digits as its factorization.

328818805709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178094.

The product of its (nonzero) digits is 7741440, while the sum is 59.

The spelling of 328818805709 in words is "three hundred twenty-eight billion, eight hundred eighteen million, eight hundred five thousand, seven hundred nine".