327638045491 has 2 divisors, whose sum is σ = 327638045492. Its totient is φ = 327638045490.

The previous prime is 327638045459. The next prime is 327638045503. The reversal of 327638045491 is 194540836723.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 327638045491 - 2⁵ = 327638045459 is a prime.

It is not a weakly prime, because it can be changed into another prime (327638015491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163819022745 + 163819022746.

It is an arithmetic number, because the mean of its divisors is an integer number (163819022746).

It is a 1-persistent number, because it is pandigital, but 2⋅327638045491 = 655276090982 is not.

Almost surely, 2^327638045491 is an apocalyptic number.

327638045491 is a deficient number, since it is larger than the sum of its proper divisors (1).

327638045491 is an equidigital number, since it uses as much as digits as its factorization.

327638045491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 327638045491 in words is "three hundred twenty-seven billion, six hundred thirty-eight million, forty-five thousand, four hundred ninety-one".