327638045549 has 2 divisors, whose sum is σ = 327638045550.
Its totient is φ = 327638045548.
The previous prime is 327638045543. The next prime is 327638045599. The reversal of 327638045549 is 945540836723.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 220566426025 + 107071619524 = 469645^2 + 327218^2
It is a cyclic number.
It is not a de Polignac number, because 327638045549 - 212 = 327638041453 is a prime.
It is a super-3 number, since 3×3276380455493 (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.
It is a junction number, because it is equal to n+sod(n) for n = 327638045494 and 327638045503.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (327638045543) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163819022774 + 163819022775.
It is an arithmetic number, because the mean of its divisors is an integer number (163819022775).
Almost surely, 2327638045549 is an apocalyptic number.
It is an amenable number.
327638045549 is a deficient number, since it is larger than the sum of its proper divisors (1).
327638045549 is an equidigital number, since it uses as much as digits as its factorization.
327638045549 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 21772800, while the sum is 56.
The spelling of 327638045549 in words is "three hundred twenty-seven billion, six hundred thirty-eight million, forty-five thousand, five hundred forty-nine".