776806368672 has 24 divisors (see below), whose sum is σ = 2039116718016. Its totient is φ = 258935456192.

The previous prime is 776806368649. The next prime is 776806368673. The reversal of 776806368672 is 276863608677.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (776806368673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4045866408 + ... + 4045866599.

It is an arithmetic number, because the mean of its divisors is an integer number (84963196584).

Almost surely, 2^776806368672 is an apocalyptic number.

It is an amenable number.

776806368672 is an abundant number, since it is smaller than the sum of its proper divisors (1262310349344).

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

776806368672 is a wasteful number, since it uses less digits than its factorization.

776806368672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8091733020 (or 8091733012 counting only the distinct ones).

The product of its (nonzero) digits is 170698752, while the sum is 66.

The spelling of 776806368672 in words is "seven hundred seventy-six billion, eight hundred six million, three hundred sixty-eight thousand, six hundred seventy-two".