6781115456 has 28 divisors (see below), whose sum is σ = 13459559568. Its totient is φ = 3389730432.

The previous prime is 6781115449. The next prime is 6781115503. The reversal of 6781115456 is 6545111876.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316475 + ... + 337221.

It is an arithmetic number, because the mean of its divisors is an integer number (480698556).

Almost surely, 2^6781115456 is an apocalyptic number.

It is an amenable number.

6781115456 is a deficient number, since it is larger than the sum of its proper divisors (6678444112).

6781115456 is a wasteful number, since it uses less digits than its factorization.

6781115456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25866 (or 25856 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The square root of 6781115456 is about 82347.5285360769. The cubic root of 6781115456 is about 1892.7810514180.

The spelling of 6781115456 in words is "six billion, seven hundred eighty-one million, one hundred fifteen thousand, four hundred fifty-six".