12640804629437 has 2 divisors, whose sum is σ = 12640804629438. Its totient is φ = 12640804629436.

The previous prime is 12640804629413. The next prime is 12640804629449. The reversal of 12640804629437 is 73492640804621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8898324796036 + 3742479833401 = 2983006^2 + 1934549^2 .

It is a cyclic number.

It is not a de Polignac number, because 12640804629437 - 2¹⁸ = 12640804367293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12640804629737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320402314718 + 6320402314719.

It is an arithmetic number, because the mean of its divisors is an integer number (6320402314719).

Almost surely, 2^{12640804629437} is an apocalyptic number.

It is an amenable number.

12640804629437 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640804629437 is an equidigital number, since it uses as much as digits as its factorization.

12640804629437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 12640804629437 in words is "twelve trillion, six hundred forty billion, eight hundred four million, six hundred twenty-nine thousand, four hundred thirty-seven".