6781448844 has 96 divisors (see below), whose sum is σ = 17884500480. Its totient is φ = 2221732800.

The previous prime is 6781448819. The next prime is 6781448867. The reversal of 6781448844 is 4488441876.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 2858979 + ... + 2861349.

It is an arithmetic number, because the mean of its divisors is an integer number (186296880).

Almost surely, 2^6781448844 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 6781448844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8942250240).

6781448844 is an abundant number, since it is smaller than the sum of its proper divisors (11103051636).

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

6781448844 is a wasteful number, since it uses less digits than its factorization.

6781448844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828 (or 2820 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 54.

The square root of 6781448844 is about 82349.5527856709. The cubic root of 6781448844 is about 1892.8120699208.

It can be divided in two parts, 6781 and 448844, that added together give a square (455625 = 675²).

The spelling of 6781448844 in words is "six billion, seven hundred eighty-one million, four hundred forty-eight thousand, eight hundred forty-four".