6778047128 has 8 divisors (see below), whose sum is σ = 12708838380. Its totient is φ = 3389023560.

The previous prime is 6778047121. The next prime is 6778047179. The reversal of 6778047128 is 8217408776.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778047121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423627938 + ... + 423627953.

Almost surely, 2^6778047128 is an apocalyptic number.

It is an amenable number.

6778047128 is a deficient number, since it is larger than the sum of its proper divisors (5930791252).

6778047128 is a wasteful number, since it uses less digits than its factorization.

6778047128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847255897 (or 847255893 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 50.

The square root of 6778047128 is about 82328.8960693632. The cubic root of 6778047128 is about 1892.4955256658.

The spelling of 6778047128 in words is "six billion, seven hundred seventy-eight million, forty-seven thousand, one hundred twenty-eight".