778806016 has 72 divisors (see below), whose sum is σ = 1594483520. Its totient is φ = 379551744.

The previous prime is 778805999. The next prime is 778806043. The reversal of 778806016 is 610608877.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1961530 + ... + 1961926.

Almost surely, 2^778806016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778806016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797241760).

778806016 is an abundant number, since it is smaller than the sum of its proper divisors (815677504).

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

778806016 is an equidigital number, since it uses as much as digits as its factorization.

778806016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 778806016 is about 27907.0961585042. The cubic root of 778806016 is about 920.0464752829.

The spelling of 778806016 in words is "seven hundred seventy-eight million, eight hundred six thousand, sixteen".