6809219824 has 90 divisors (see below), whose sum is σ = 14754732720. Its totient is φ = 3041438400.

The previous prime is 6809219777. The next prime is 6809219861. The reversal of 6809219824 is 4289129086.

It is a super-2 number, since 2×6809219824² = 92730949223109181952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32271079 + ... + 32271289.

Almost surely, 2^6809219824 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 6809219824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7377366360).

6809219824 is an abundant number, since it is smaller than the sum of its proper divisors (7945512896).

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

6809219824 is a wasteful number, since it uses less digits than its factorization.

6809219824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 6809219824 is about 82517.9969703579. The cubic root of 6809219824 is about 1895.3923275295.

The spelling of 6809219824 in words is "six billion, eight hundred nine million, two hundred nineteen thousand, eight hundred twenty-four".