6851343408 has 320 divisors, whose sum is σ = 23230513152. Its totient is φ = 1690444800.

The previous prime is 6851343407. The next prime is 6851343413. The reversal of 6851343408 is 8043431586.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 6851343408.

It is not an unprimeable number, because it can be changed into a prime (6851343407) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4721083 + ... + 4722533.

Almost surely, 2^6851343408 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 6851343408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11615256576).

6851343408 is an abundant number, since it is smaller than the sum of its proper divisors (16379169744).

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

6851343408 is a wasteful number, since it uses less digits than its factorization.

6851343408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552 (or 1546 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 6851343408 is about 82772.8422128901. The cubic root of 6851343408 is about 1899.2927569026.

The spelling of 6851343408 in words is "six billion, eight hundred fifty-one million, three hundred forty-three thousand, four hundred eight".