12278445679 has 2 divisors, whose sum is σ = 12278445680. Its totient is φ = 12278445678.

The previous prime is 12278445611. The next prime is 12278445701. The reversal of 12278445679 is 97654487221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12278445679 - 2¹¹ = 12278443631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12278445779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6139222839 + 6139222840.

It is an arithmetic number, because the mean of its divisors is an integer number (6139222840).

Almost surely, 2^12278445679 is an apocalyptic number.

12278445679 is a deficient number, since it is larger than the sum of its proper divisors (1).

12278445679 is an equidigital number, since it uses as much as digits as its factorization.

12278445679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 55.

The spelling of 12278445679 in words is "twelve billion, two hundred seventy-eight million, four hundred forty-five thousand, six hundred seventy-nine".