328129458550321 has 2 divisors, whose sum is σ = 328129458550322. Its totient is φ = 328129458550320.

The previous prime is 328129458550273. The next prime is 328129458550381. The reversal of 328129458550321 is 123055854921823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324907114032400 + 3222344517921 = 18025180^2 + 1795089^2 .

It is a cyclic number.

It is not a de Polignac number, because 328129458550321 - 2³⁷ = 327992019596849 is a prime.

It is not a weakly prime, because it can be changed into another prime (328129458550381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164064729275160 + 164064729275161.

It is an arithmetic number, because the mean of its divisors is an integer number (164064729275161).

Almost surely, 2^{328129458550321} is an apocalyptic number.

It is an amenable number.

328129458550321 is a deficient number, since it is larger than the sum of its proper divisors (1).

328129458550321 is an equidigital number, since it uses as much as digits as its factorization.

328129458550321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736000, while the sum is 58.

The spelling of 328129458550321 in words is "three hundred twenty-eight trillion, one hundred twenty-nine billion, four hundred fifty-eight million, five hundred fifty thousand, three hundred twenty-one".