6816720312 has 48 divisors (see below), whose sum is σ = 19264649040. Its totient is φ = 2173446528.

The previous prime is 6816720283. The next prime is 6816720319. The reversal of 6816720312 is 2130276186.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6816720319) 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, 2056533 + ... + 2059844.

It is an arithmetic number, because the mean of its divisors is an integer number (401346855).

Almost surely, 2^6816720312 is an apocalyptic number.

It is an amenable number.

6816720312 is an abundant number, since it is smaller than the sum of its proper divisors (12447928728).

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

6816720312 is a wasteful number, since it uses less digits than its factorization.

6816720312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116412 (or 4116405 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 6816720312 is about 82563.4320507572. The cubic root of 6816720312 is about 1896.0880093207.

Adding to 6816720312 its reverse (2130276186), we get a palindrome (8946996498).

The spelling of 6816720312 in words is "six billion, eight hundred sixteen million, seven hundred twenty thousand, three hundred twelve".