6839905637989 has 2 divisors, whose sum is σ = 6839905637990. Its totient is φ = 6839905637988.

The previous prime is 6839905637879. The next prime is 6839905638061. The reversal of 6839905637989 is 9897365099386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6778644437889 + 61261200100 = 2603583^2 + 247510^2 .

It is a cyclic number.

It is not a de Polignac number, because 6839905637989 - 2⁷ = 6839905637861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6839905637489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3419952818994 + 3419952818995.

It is an arithmetic number, because the mean of its divisors is an integer number (3419952818995).

Almost surely, 2^{6839905637989} is an apocalyptic number.

It is an amenable number.

6839905637989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6839905637989 is an equidigital number, since it uses as much as digits as its factorization.

6839905637989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4761711360, while the sum is 82.

The spelling of 6839905637989 in words is "six trillion, eight hundred thirty-nine billion, nine hundred five million, six hundred thirty-seven thousand, nine hundred eighty-nine".