6443626429 has 2 divisors, whose sum is σ = 6443626430. Its totient is φ = 6443626428.

The previous prime is 6443626391. The next prime is 6443626439. The reversal of 6443626429 is 9246263446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5867866404 + 575760025 = 76602^2 + 23995^2 .

It is a cyclic number.

It is not a de Polignac number, because 6443626429 - 2²⁷ = 6309408701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6443626439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221813214 + 3221813215.

It is an arithmetic number, because the mean of its divisors is an integer number (3221813215).

Almost surely, 2^6443626429 is an apocalyptic number.

It is an amenable number.

6443626429 is a deficient number, since it is larger than the sum of its proper divisors (1).

6443626429 is an equidigital number, since it uses as much as digits as its factorization.

6443626429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 46.

The square root of 6443626429 is about 80272.2020938756. The cubic root of 6443626429 is about 1860.8446494241.

The spelling of 6443626429 in words is "six billion, four hundred forty-three million, six hundred twenty-six thousand, four hundred twenty-nine".