6440828841 has 12 divisors (see below), whose sum is σ = 9421185280. Its totient is φ = 4239532440.

The previous prime is 6440828837. The next prime is 6440828861. The reversal of 6440828841 is 1488280446.

It is not a de Polignac number, because 6440828841 - 2² = 6440828837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6440828861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4528705 + ... + 4530126.

Almost surely, 2^6440828841 is an apocalyptic number.

It is an amenable number.

6440828841 is a deficient number, since it is larger than the sum of its proper divisors (2980356439).

6440828841 is a wasteful number, since it uses less digits than its factorization.

6440828841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9058916 (or 9058913 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The square root of 6440828841 is about 80254.7745682461. The cubic root of 6440828841 is about 1860.5753067747.

The spelling of 6440828841 in words is "six billion, four hundred forty million, eight hundred twenty-eight thousand, eight hundred forty-one".