6489833840 has 80 divisors (see below), whose sum is σ = 17402784960. Its totient is φ = 2204651520.

The previous prime is 6489833773. The next prime is 6489833873. The reversal of 6489833840 is 483389846.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7880 + ... + 114200.

It is an arithmetic number, because the mean of its divisors is an integer number (217534812).

Almost surely, 2^6489833840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6489833840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8701392480).

6489833840 is an abundant number, since it is smaller than the sum of its proper divisors (10912951120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6489833840 is a wasteful number, since it uses less digits than its factorization.

6489833840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106450 (or 106444 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 53.

The square root of 6489833840 is about 80559.5049637223. The cubic root of 6489833840 is about 1865.2821141703.

The spelling of 6489833840 in words is "six billion, four hundred eighty-nine million, eight hundred thirty-three thousand, eight hundred forty".