6448442549 has 2 divisors, whose sum is σ = 6448442550. Its totient is φ = 6448442548.

The previous prime is 6448442513. The next prime is 6448442591. The reversal of 6448442549 is 9452448446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6137625649 + 310816900 = 78343^2 + 17630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6448442549 is a prime.

It is a super-2 number, since 2×6448442549² = 83164822615507234802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6448442497 and 6448442506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6448447549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224221274 + 3224221275.

It is an arithmetic number, because the mean of its divisors is an integer number (3224221275).

Almost surely, 2^6448442549 is an apocalyptic number.

It is an amenable number.

6448442549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6448442549 is an equidigital number, since it uses as much as digits as its factorization.

6448442549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4423680, while the sum is 50.

The square root of 6448442549 is about 80302.1951692480. The cubic root of 6448442549 is about 1861.3081471838.

The spelling of 6448442549 in words is "six billion, four hundred forty-eight million, four hundred forty-two thousand, five hundred forty-nine".