326661111689 has 6 divisors (see below), whose sum is σ = 359057255130. Its totient is φ = 296964646880.

The previous prime is 326661111671. The next prime is 326661111709. The reversal of 326661111689 is 986111166623.

It can be written as a sum of positive squares in only one way, i.e., 310379351689 + 16281760000 = 557117^2 + 127600^2 .

It is not a de Polignac number, because 326661111689 - 2³² = 322366144393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326661111659) 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 5 ways as a sum of consecutive naturals, for example, 1349839184 + ... + 1349839425.

It is an arithmetic number, because the mean of its divisors is an integer number (59842875855).

Almost surely, 2^326661111689 is an apocalyptic number.

It is an amenable number.

326661111689 is a deficient number, since it is larger than the sum of its proper divisors (32396143441).

326661111689 is a wasteful number, since it uses less digits than its factorization.

326661111689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699678631 (or 2699678620 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The spelling of 326661111689 in words is "three hundred twenty-six billion, six hundred sixty-one million, one hundred eleven thousand, six hundred eighty-nine".