12845481689 has 2 divisors, whose sum is σ = 12845481690. Its totient is φ = 12845481688.

The previous prime is 12845481679. The next prime is 12845481713. The reversal of 12845481689 is 98618454821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12773520400 + 71961289 = 113020^2 + 8483^2 .

It is a cyclic number.

It is not a de Polignac number, because 12845481689 - 2⁸ = 12845481433 is a prime.

It is not a weakly prime, because it can be changed into another prime (12845481619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6422740844 + 6422740845.

It is an arithmetic number, because the mean of its divisors is an integer number (6422740845).

Almost surely, 2^12845481689 is an apocalyptic number.

It is an amenable number.

12845481689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12845481689 is an equidigital number, since it uses as much as digits as its factorization.

12845481689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4423680, while the sum is 56.

The spelling of 12845481689 in words is "twelve billion, eight hundred forty-five million, four hundred eighty-one thousand, six hundred eighty-nine".