12928489208489 has 4 divisors (see below), whose sum is σ = 12934701843540. Its totient is φ = 12922276573440.

The previous prime is 12928489208461. The next prime is 12928489208497. The reversal of 12928489208489 is 98480298482921.

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 3431663625625 + 9496825582864 = 1852475^2 + 3081692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12928489208489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12928489208449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3106314404 + ... + 3106318565.

It is an arithmetic number, because the mean of its divisors is an integer number (3233675460885).

Almost surely, 2^{12928489208489} is an apocalyptic number.

It is an amenable number.

12928489208489 is a deficient number, since it is larger than the sum of its proper divisors (6212635051).

12928489208489 is an equidigital number, since it uses as much as digits as its factorization.

12928489208489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6212635050.

The product of its (nonzero) digits is 382205952, while the sum is 74.

The spelling of 12928489208489 in words is "twelve trillion, nine hundred twenty-eight billion, four hundred eighty-nine million, two hundred eight thousand, four hundred eighty-nine".