6839905637779 has 2 divisors, whose sum is σ = 6839905637780. Its totient is φ = 6839905637778.

The previous prime is 6839905637737. The next prime is 6839905637791. The reversal of 6839905637779 is 9777365099386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6839905637779 - 2⁹ = 6839905637267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6839905637699 and 6839905637708.

It is not a weakly prime, because it can be changed into another prime (6839905637479) 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, 3419952818889 + 3419952818890.

It is an arithmetic number, because the mean of its divisors is an integer number (3419952818890).

Almost surely, 2^{6839905637779} is an apocalyptic number.

6839905637779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6839905637779 is an equidigital number, since it uses as much as digits as its factorization.

6839905637779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240609120, while the sum is 79.

The spelling of 6839905637779 in words is "six trillion, eight hundred thirty-nine billion, nine hundred five million, six hundred thirty-seven thousand, seven hundred seventy-nine".