6842234550421 has 2 divisors, whose sum is σ = 6842234550422. Its totient is φ = 6842234550420.

The previous prime is 6842234550397. The next prime is 6842234550497. The reversal of 6842234550421 is 1240554322486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6751006992900 + 91227557521 = 2598270^2 + 302039^2 .

It is a cyclic number.

It is not a de Polignac number, because 6842234550421 - 2¹⁵ = 6842234517653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6842234550521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421117275210 + 3421117275211.

It is an arithmetic number, because the mean of its divisors is an integer number (3421117275211).

Almost surely, 2^{6842234550421} is an apocalyptic number.

It is an amenable number.

6842234550421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6842234550421 is an equidigital number, since it uses as much as digits as its factorization.

6842234550421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1843200, while the sum is 46.

The spelling of 6842234550421 in words is "six trillion, eight hundred forty-two billion, two hundred thirty-four million, five hundred fifty thousand, four hundred twenty-one".