646341143629 has 2 divisors, whose sum is σ = 646341143630. Its totient is φ = 646341143628.

The previous prime is 646341143627. The next prime is 646341143653. The reversal of 646341143629 is 926341143646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391419153225 + 254921990404 = 625635^2 + 504898^2 .

It is a cyclic number.

It is not a de Polignac number, because 646341143629 - 2¹ = 646341143627 is a prime.

Together with 646341143627, 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 (646341143627) 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, 323170571814 + 323170571815.

It is an arithmetic number, because the mean of its divisors is an integer number (323170571815).

Almost surely, 2^646341143629 is an apocalyptic number.

It is an amenable number.

646341143629 is a deficient number, since it is larger than the sum of its proper divisors (1).

646341143629 is an equidigital number, since it uses as much as digits as its factorization.

646341143629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 49.

The spelling of 646341143629 in words is "six hundred forty-six billion, three hundred forty-one million, one hundred forty-three thousand, six hundred twenty-nine".