328428527891 has 2 divisors, whose sum is σ = 328428527892. Its totient is φ = 328428527890.

The previous prime is 328428527887. The next prime is 328428527951. The reversal of 328428527891 is 198725824823.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 328428527891 - 2² = 328428527887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328428527891.

It is not a weakly prime, because it can be changed into another prime (328428527851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164214263945 + 164214263946.

It is an arithmetic number, because the mean of its divisors is an integer number (164214263946).

Almost surely, 2^328428527891 is an apocalyptic number.

328428527891 is a deficient number, since it is larger than the sum of its proper divisors (1).

328428527891 is an equidigital number, since it uses as much as digits as its factorization.

328428527891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15482880, while the sum is 59.

The spelling of 328428527891 in words is "three hundred twenty-eight billion, four hundred twenty-eight million, five hundred twenty-seven thousand, eight hundred ninety-one".