6448341821 has 4 divisors (see below), whose sum is σ = 6448513692. Its totient is φ = 6448169952.

The previous prime is 6448341799. The next prime is 6448341829. The reversal of 6448341821 is 1281438446.

6448341821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4288416196 + 2159925625 = 65486^2 + 46475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6448341821 is a prime.

It is a super-2 number, since 2×6448341821² = 83162224480915192082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6448341829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2936 + ... + 113601.

It is an arithmetic number, because the mean of its divisors is an integer number (1612128423).

Almost surely, 2^6448341821 is an apocalyptic number.

It is an amenable number.

6448341821 is a deficient number, since it is larger than the sum of its proper divisors (171871).

6448341821 is a wasteful number, since it uses less digits than its factorization.

6448341821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171870.

The product of its digits is 147456, while the sum is 41.

The square root of 6448341821 is about 80301.5679859366. The cubic root of 6448341821 is about 1861.2984556022.

The spelling of 6448341821 in words is "six billion, four hundred forty-eight million, three hundred forty-one thousand, eight hundred twenty-one".