12840946727929 has 2 divisors, whose sum is σ = 12840946727930. Its totient is φ = 12840946727928.

The previous prime is 12840946727899. The next prime is 12840946727933. The reversal of 12840946727929 is 92972764904821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9863085708025 + 2977861019904 = 3140555^2 + 1725648^2 .

It is a cyclic number.

It is not a de Polignac number, because 12840946727929 - 2¹⁷ = 12840946596857 is a prime.

It is not a weakly prime, because it can be changed into another prime (12840946721929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6420473363964 + 6420473363965.

It is an arithmetic number, because the mean of its divisors is an integer number (6420473363965).

Almost surely, 2^{12840946727929} is an apocalyptic number.

It is an amenable number.

12840946727929 is a deficient number, since it is larger than the sum of its proper divisors (1).

12840946727929 is an equidigital number, since it uses as much as digits as its factorization.

12840946727929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219469824, while the sum is 70.

The spelling of 12840946727929 in words is "twelve trillion, eight hundred forty billion, nine hundred forty-six million, seven hundred twenty-seven thousand, nine hundred twenty-nine".