4544967823421 has 2 divisors, whose sum is σ = 4544967823422. Its totient is φ = 4544967823420.

The previous prime is 4544967823399. The next prime is 4544967823423. The reversal of 4544967823421 is 1243287694454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3869144076196 + 675823747225 = 1967014^2 + 822085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4544967823421 is a prime.

It is a super-2 number, since 2×4544967823421² (a number of 26 digits) contains 22 as substring.

Together with 4544967823423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4544967823423) 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, 2272483911710 + 2272483911711.

It is an arithmetic number, because the mean of its divisors is an integer number (2272483911711).

Almost surely, 2^{4544967823421} is an apocalyptic number.

It is an amenable number.

4544967823421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4544967823421 is an equidigital number, since it uses as much as digits as its factorization.

4544967823421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46448640, while the sum is 59.

The spelling of 4544967823421 in words is "four trillion, five hundred forty-four billion, nine hundred sixty-seven million, eight hundred twenty-three thousand, four hundred twenty-one".