328580647309 has 2 divisors, whose sum is σ = 328580647310. Its totient is φ = 328580647308.

The previous prime is 328580647237. The next prime is 328580647313. The reversal of 328580647309 is 903746085823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239460486409 + 89120160900 = 489347^2 + 298530^2 .

It is a cyclic number.

It is not a de Polignac number, because 328580647309 - 2²³ = 328572258701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328580647309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328580647009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164290323654 + 164290323655.

It is an arithmetic number, because the mean of its divisors is an integer number (164290323655).

Almost surely, 2^328580647309 is an apocalyptic number.

It is an amenable number.

328580647309 is a deficient number, since it is larger than the sum of its proper divisors (1).

328580647309 is an equidigital number, since it uses as much as digits as its factorization.

328580647309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 328580647309 in words is "three hundred twenty-eight billion, five hundred eighty million, six hundred forty-seven thousand, three hundred nine".