12278319089 has 4 divisors (see below), whose sum is σ = 12279294324. Its totient is φ = 12277343856.

The previous prime is 12278319047. The next prime is 12278319091. The reversal of 12278319089 is 98091387221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98091387221 = 154699 ⋅634079.

It can be written as a sum of positive squares in 2 ways, for example, as 5448949489 + 6829369600 = 73817^2 + 82640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278319089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12278319689) 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, 468482 + ... + 493995.

It is an arithmetic number, because the mean of its divisors is an integer number (3069823581).

Almost surely, 2^12278319089 is an apocalyptic number.

It is an amenable number.

12278319089 is a deficient number, since it is larger than the sum of its proper divisors (975235).

12278319089 is an equidigital number, since it uses as much as digits as its factorization.

12278319089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975234.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 12278319089 in words is "twelve billion, two hundred seventy-eight million, three hundred nineteen thousand, eighty-nine".