19664048629 has 2 divisors, whose sum is σ = 19664048630. Its totient is φ = 19664048628.

The previous prime is 19664048627. The next prime is 19664048653. The reversal of 19664048629 is 92684046691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19606440529 + 57608100 = 140023^2 + 7590^2 .

It is a cyclic number.

It is not a de Polignac number, because 19664048629 - 2¹ = 19664048627 is a prime.

Together with 19664048627, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19664048629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19664048623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9832024314 + 9832024315.

It is an arithmetic number, because the mean of its divisors is an integer number (9832024315).

Almost surely, 2^19664048629 is an apocalyptic number.

It is an amenable number.

19664048629 is a deficient number, since it is larger than the sum of its proper divisors (1).

19664048629 is an equidigital number, since it uses as much as digits as its factorization.

19664048629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 19664048629 in words is "nineteen billion, six hundred sixty-four million, forty-eight thousand, six hundred twenty-nine".