6439536417673 has 2 divisors, whose sum is σ = 6439536417674. Its totient is φ = 6439536417672.

The previous prime is 6439536417599. The next prime is 6439536417683. The reversal of 6439536417673 is 3767146359346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5996949583689 + 442586833984 = 2448867^2 + 665272^2 .

It is a cyclic number.

It is not a de Polignac number, because 6439536417673 - 2²⁹ = 6438999546761 is a prime.

It is not a weakly prime, because it can be changed into another prime (6439536417683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219768208836 + 3219768208837.

It is an arithmetic number, because the mean of its divisors is an integer number (3219768208837).

Almost surely, 2^{6439536417673} is an apocalyptic number.

It is an amenable number.

6439536417673 is a deficient number, since it is larger than the sum of its proper divisors (1).

6439536417673 is an equidigital number, since it uses as much as digits as its factorization.

6439536417673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 205752960, while the sum is 64.

The spelling of 6439536417673 in words is "six trillion, four hundred thirty-nine billion, five hundred thirty-six million, four hundred seventeen thousand, six hundred seventy-three".