12708640349 has 2 divisors, whose sum is σ = 12708640350. Its totient is φ = 12708640348.

The previous prime is 12708640319. The next prime is 12708640369. The reversal of 12708640349 is 94304680721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7279161124 + 5429479225 = 85318^2 + 73685^2 .

It is a cyclic number.

It is not a de Polignac number, because 12708640349 - 2⁸ = 12708640093 is a prime.

It is a super-3 number, since 3×12708640349³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12708640319) 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, 6354320174 + 6354320175.

It is an arithmetic number, because the mean of its divisors is an integer number (6354320175).

Almost surely, 2^12708640349 is an apocalyptic number.

It is an amenable number.

12708640349 is a deficient number, since it is larger than the sum of its proper divisors (1).

12708640349 is an equidigital number, since it uses as much as digits as its factorization.

12708640349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 12708640349 in words is "twelve billion, seven hundred eight million, six hundred forty thousand, three hundred forty-nine".