6842234550521 has 2 divisors, whose sum is σ = 6842234550522. Its totient is φ = 6842234550520.

The previous prime is 6842234550509. The next prime is 6842234550523. The reversal of 6842234550521 is 1250554322486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6265189217296 + 577045333225 = 2503036^2 + 759635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6842234550521 is a prime.

Together with 6842234550523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6842234550523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421117275260 + 3421117275261.

It is an arithmetic number, because the mean of its divisors is an integer number (3421117275261).

Almost surely, 2^{6842234550521} is an apocalyptic number.

It is an amenable number.

6842234550521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6842234550521 is an equidigital number, since it uses as much as digits as its factorization.

6842234550521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304000, while the sum is 47.

The spelling of 6842234550521 in words is "six trillion, eight hundred forty-two billion, two hundred thirty-four million, five hundred fifty thousand, five hundred twenty-one".