6778928963 has 12 divisors (see below), whose sum is σ = 6933785040. Its totient is φ = 6627264480.

The previous prime is 6778928909. The next prime is 6778928977. The reversal of 6778928963 is 3698298776.

6778928963 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-6778928963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6778928963.

It is not an unprimeable number, because it can be changed into a prime (6778928903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 615953 + ... + 626861.

It is an arithmetic number, because the mean of its divisors is an integer number (577815420).

Almost surely, 2^6778928963 is an apocalyptic number.

6778928963 is a deficient number, since it is larger than the sum of its proper divisors (154856077).

6778928963 is a wasteful number, since it uses less digits than its factorization.

6778928963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11198 (or 11137 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 65.

The square root of 6778928963 is about 82334.2514570941. The cubic root of 6778928963 is about 1892.5775943596.

The spelling of 6778928963 in words is "six billion, seven hundred seventy-eight million, nine hundred twenty-eight thousand, nine hundred sixty-three".