6819711808 has 126 divisors (see below), whose sum is σ = 16994812086. Its totient is φ = 2691311616.

The previous prime is 6819711763. The next prime is 6819711827. The reversal of 6819711808 is 8081179186.

It can be written as a sum of positive squares in 3 ways, for example, as 2729853504 + 4089858304 = 52248^2 + 63952^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

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, 16673908 + ... + 16674316.

It is an arithmetic number, because the mean of its divisors is an integer number (134879461).

Almost surely, 2^6819711808 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 6819711808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8497406043).

6819711808 is an abundant number, since it is smaller than the sum of its proper divisors (10175100278).

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

6819711808 is an equidigital number, since it uses as much as digits as its factorization.

6819711808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 49.

The square root of 6819711808 is about 82581.5464132272. The cubic root of 6819711808 is about 1896.3653328186.

The spelling of 6819711808 in words is "six billion, eight hundred nineteen million, seven hundred eleven thousand, eight hundred eight".