328981793509 has 2 divisors, whose sum is σ = 328981793510. Its totient is φ = 328981793508.

The previous prime is 328981793501. The next prime is 328981793557. The reversal of 328981793509 is 905397189823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325983902500 + 2997891009 = 570950^2 + 54753^2 .

It is a cyclic number.

It is not a de Polignac number, because 328981793509 - 2³ = 328981793501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328981793501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164490896754 + 164490896755.

It is an arithmetic number, because the mean of its divisors is an integer number (164490896755).

Almost surely, 2^328981793509 is an apocalyptic number.

It is an amenable number.

328981793509 is a deficient number, since it is larger than the sum of its proper divisors (1).

328981793509 is an equidigital number, since it uses as much as digits as its factorization.

328981793509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 64.

The spelling of 328981793509 in words is "three hundred twenty-eight billion, nine hundred eighty-one million, seven hundred ninety-three thousand, five hundred nine".