6391958769479 has 2 divisors, whose sum is σ = 6391958769480. Its totient is φ = 6391958769478.

The previous prime is 6391958769461. The next prime is 6391958769613. The reversal of 6391958769479 is 9749678591936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6391958769479 - 2²⁰ = 6391957720903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6391958769397 and 6391958769406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6391958769379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195979384739 + 3195979384740.

It is an arithmetic number, because the mean of its divisors is an integer number (3195979384740).

Almost surely, 2^{6391958769479} is an apocalyptic number.

6391958769479 is a deficient number, since it is larger than the sum of its proper divisors (1).

6391958769479 is an equidigital number, since it uses as much as digits as its factorization.

6391958769479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5555329920, while the sum is 83.

The spelling of 6391958769479 in words is "six trillion, three hundred ninety-one billion, nine hundred fifty-eight million, seven hundred sixty-nine thousand, four hundred seventy-nine".