778981840885056 has 224 divisors, whose sum is σ = 2068376269160448. Its totient is φ = 258740576962560.

The previous prime is 778981840885051. The next prime is 778981840885091. The reversal of 778981840885056 is 650588048189877.

778981840885056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 778981840885056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778981840885051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174542198281 + ... + 174542202743.

Almost surely, 2^{778981840885056} is an apocalyptic number.

It is an amenable number.

778981840885056 is an abundant number, since it is smaller than the sum of its proper divisors (1289394428275392).

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

778981840885056 is a wasteful number, since it uses less digits than its factorization.

778981840885056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7629 (or 7619 counting only the distinct ones).

The product of its (nonzero) digits is 8670412800, while the sum is 84.

The spelling of 778981840885056 in words is "seven hundred seventy-eight trillion, nine hundred eighty-one billion, eight hundred forty million, eight hundred eighty-five thousand, fifty-six".