321440408323189 has 2 divisors, whose sum is σ = 321440408323190. Its totient is φ = 321440408323188.

The previous prime is 321440408323157. The next prime is 321440408323283. The reversal of 321440408323189 is 981323804044123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321233319618289 + 207088704900 = 17922983^2 + 455070^2 .

It is a cyclic number.

It is not a de Polignac number, because 321440408323189 - 2⁵ = 321440408323157 is a prime.

It is a super-2 number, since 2×321440408323189² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321440408323789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160720204161594 + 160720204161595.

It is an arithmetic number, because the mean of its divisors is an integer number (160720204161595).

Almost surely, 2^{321440408323189} is an apocalyptic number.

It is an amenable number.

321440408323189 is a deficient number, since it is larger than the sum of its proper divisors (1).

321440408323189 is an equidigital number, since it uses as much as digits as its factorization.

321440408323189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3981312, while the sum is 52.

The spelling of 321440408323189 in words is "three hundred twenty-one trillion, four hundred forty billion, four hundred eight million, three hundred twenty-three thousand, one hundred eighty-nine".