6846426991 has 2 divisors, whose sum is σ = 6846426992. Its totient is φ = 6846426990.

The previous prime is 6846426989. The next prime is 6846427087. The reversal of 6846426991 is 1996246486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6846426991 - 2¹ = 6846426989 is a prime.

Together with 6846426989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6846426941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3423213495 + 3423213496.

It is an arithmetic number, because the mean of its divisors is an integer number (3423213496).

Almost surely, 2^6846426991 is an apocalyptic number.

6846426991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6846426991 is an equidigital number, since it uses as much as digits as its factorization.

6846426991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 55.

The square root of 6846426991 is about 82743.1386339677. The cubic root of 6846426991 is about 1898.8383472554.

The spelling of 6846426991 in words is "six billion, eight hundred forty-six million, four hundred twenty-six thousand, nine hundred ninety-one".