12840791629 has 2 divisors, whose sum is σ = 12840791630. Its totient is φ = 12840791628.

The previous prime is 12840791627. The next prime is 12840791671. The reversal of 12840791629 is 92619704821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12315006729 + 525784900 = 110973^2 + 22930^2 .

It is a cyclic number.

It is not a de Polignac number, because 12840791629 - 2¹ = 12840791627 is a prime.

Together with 12840791627, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12840791627) 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, 6420395814 + 6420395815.

It is an arithmetic number, because the mean of its divisors is an integer number (6420395815).

Almost surely, 2^12840791629 is an apocalyptic number.

It is an amenable number.

12840791629 is a deficient number, since it is larger than the sum of its proper divisors (1).

12840791629 is an equidigital number, since it uses as much as digits as its factorization.

12840791629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 12840791629 in words is "twelve billion, eight hundred forty million, seven hundred ninety-one thousand, six hundred twenty-nine".