12648181709 has 2 divisors, whose sum is σ = 12648181710. Its totient is φ = 12648181708.

The previous prime is 12648181657. The next prime is 12648181729. The reversal of 12648181709 is 90718184621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11979959209 + 668222500 = 109453^2 + 25850^2 .

It is a cyclic number.

It is not a de Polignac number, because 12648181709 - 2⁸ = 12648181453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12648181729) 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, 6324090854 + 6324090855.

It is an arithmetic number, because the mean of its divisors is an integer number (6324090855).

Almost surely, 2^12648181709 is an apocalyptic number.

It is an amenable number.

12648181709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12648181709 is an equidigital number, since it uses as much as digits as its factorization.

12648181709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 12648181709 in words is "twelve billion, six hundred forty-eight million, one hundred eighty-one thousand, seven hundred nine".