12678669329 has 2 divisors, whose sum is σ = 12678669330. Its totient is φ = 12678669328.

The previous prime is 12678669319. The next prime is 12678669349. The reversal of 12678669329 is 92396687621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11477908225 + 1200761104 = 107135^2 + 34652^2 .

It is a cyclic number.

It is not a de Polignac number, because 12678669329 - 2⁴ = 12678669313 is a prime.

It is not a weakly prime, because it can be changed into another prime (12678669319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6339334664 + 6339334665.

It is an arithmetic number, because the mean of its divisors is an integer number (6339334665).

Almost surely, 2^12678669329 is an apocalyptic number.

It is an amenable number.

12678669329 is a deficient number, since it is larger than the sum of its proper divisors (1).

12678669329 is an equidigital number, since it uses as much as digits as its factorization.

12678669329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 59.

The spelling of 12678669329 in words is "twelve billion, six hundred seventy-eight million, six hundred sixty-nine thousand, three hundred twenty-nine".