12798748217 has 2 divisors, whose sum is σ = 12798748218. Its totient is φ = 12798748216.

The previous prime is 12798748121. The next prime is 12798748229. The reversal of 12798748217 is 71284789721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7167146281 + 5631601936 = 84659^2 + 75044^2 .

It is a cyclic number.

It is not a de Polignac number, because 12798748217 - 2¹² = 12798744121 is a prime.

It is not a weakly prime, because it can be changed into another prime (12798747217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6399374108 + 6399374109.

It is an arithmetic number, because the mean of its divisors is an integer number (6399374109).

Almost surely, 2^12798748217 is an apocalyptic number.

It is an amenable number.

12798748217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12798748217 is an equidigital number, since it uses as much as digits as its factorization.

12798748217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 56.

The spelling of 12798748217 in words is "twelve billion, seven hundred ninety-eight million, seven hundred forty-eight thousand, two hundred seventeen".