328428173065 has 4 divisors (see below), whose sum is σ = 394113807684. Its totient is φ = 262742538448.

The previous prime is 328428173063. The next prime is 328428173141. The reversal of 328428173065 is 560371824823.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205547077129 + 122881095936 = 453373^2 + 350544^2 .

It is a cyclic number.

It is not a de Polignac number, because 328428173065 - 2¹ = 328428173063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328428173063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32842817302 + ... + 32842817311.

It is an arithmetic number, because the mean of its divisors is an integer number (98528451921).

Almost surely, 2^328428173065 is an apocalyptic number.

It is an amenable number.

328428173065 is a deficient number, since it is larger than the sum of its proper divisors (65685634619).

328428173065 is an equidigital number, since it uses as much as digits as its factorization.

328428173065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65685634618.

The product of its (nonzero) digits is 1935360, while the sum is 49.

Adding to 328428173065 its reverse (560371824823), we get a palindrome (888799997888).

The spelling of 328428173065 in words is "three hundred twenty-eight billion, four hundred twenty-eight million, one hundred seventy-three thousand, sixty-five".