777716216 has 16 divisors (see below), whose sum is σ = 1460495400. Its totient is φ = 388250784.

The previous prime is 777716213. The next prime is 777716243. The reversal of 777716216 is 612617777.

777716216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777716213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70451 + ... + 80738.

Almost surely, 2^777716216 is an apocalyptic number.

It is an amenable number.

777716216 is a deficient number, since it is larger than the sum of its proper divisors (682779184).

777716216 is a wasteful number, since it uses less digits than its factorization.

777716216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151838 (or 151834 counting only the distinct ones).

The product of its digits is 172872, while the sum is 44.

The square root of 777716216 is about 27887.5638233245. The cubic root of 777716216 is about 919.6171280187.

The spelling of 777716216 in words is "seven hundred seventy-seven million, seven hundred sixteen thousand, two hundred sixteen".