6538944739 has 2 divisors, whose sum is σ = 6538944740. Its totient is φ = 6538944738.

The previous prime is 6538944707. The next prime is 6538944743. The reversal of 6538944739 is 9374498356.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6538944739 - 2⁵ = 6538944707 is a prime.

It is not a weakly prime, because it can be changed into another prime (6538947739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269472369 + 3269472370.

It is an arithmetic number, because the mean of its divisors is an integer number (3269472370).

Almost surely, 2^6538944739 is an apocalyptic number.

6538944739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6538944739 is an equidigital number, since it uses as much as digits as its factorization.

6538944739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 58.

The square root of 6538944739 is about 80863.7418068197. The cubic root of 6538944739 is about 1869.9753815856.

The spelling of 6538944739 in words is "six billion, five hundred thirty-eight million, nine hundred forty-four thousand, seven hundred thirty-nine".