779922816 has 64 divisors (see below), whose sum is σ = 2077470720. Its totient is φ = 259246592.

The previous prime is 779922797. The next prime is 779922823. The reversal of 779922816 is 618229977.

779922816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144421 + ... + 149723.

It is an arithmetic number, because the mean of its divisors is an integer number (32460480).

Almost surely, 2^779922816 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 779922816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1038735360).

779922816 is an abundant number, since it is smaller than the sum of its proper divisors (1297547904).

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

779922816 is a wasteful number, since it uses less digits than its factorization.

779922816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5703 (or 5691 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 779922816 is about 27927.0982380913. The cubic root of 779922816 is about 920.4860443703.

It can be divided in two parts, 77992 and 2816, that added together give a palindrome (80808).

The spelling of 779922816 in words is "seven hundred seventy-nine million, nine hundred twenty-two thousand, eight hundred sixteen".