6809912220 has 144 divisors (see below), whose sum is σ = 20422900512. Its totient is φ = 1694330880.

The previous prime is 6809912191. The next prime is 6809912233. The reversal of 6809912220 is 222199086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1298724 + ... + 1303956.

It is an arithmetic number, because the mean of its divisors is an integer number (141825698).

Almost surely, 2^6809912220 is an apocalyptic number.

6809912220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6809912220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10211450256).

6809912220 is an abundant number, since it is smaller than the sum of its proper divisors (13612988292).

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

6809912220 is a wasteful number, since it uses less digits than its factorization.

6809912220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332 (or 5307 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 6809912220 is about 82522.1922878931. The cubic root of 6809912220 is about 1895.4565697197.

The spelling of 6809912220 in words is "six billion, eight hundred nine million, nine hundred twelve thousand, two hundred twenty".