6781381344 has 192 divisors, whose sum is σ = 20697768000. Its totient is φ = 2157281280.

The previous prime is 6781381337. The next prime is 6781381393. The reversal of 6781381344 is 4431831876.

It is a self number, because there is not a number n which added to its sum of digits gives 6781381344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2228464 + ... + 2231504.

It is an arithmetic number, because the mean of its divisors is an integer number (107800875).

Almost surely, 2^6781381344 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 6781381344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10348884000).

6781381344 is an abundant number, since it is smaller than the sum of its proper divisors (13916386656).

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

6781381344 is a wasteful number, since it uses less digits than its factorization.

6781381344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178 (or 3164 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 6781381344 is about 82349.1429463598. The cubic root of 6781381344 is about 1892.8057897860.

The spelling of 6781381344 in words is "six billion, seven hundred eighty-one million, three hundred eighty-one thousand, three hundred forty-four".