778078016 has 14 divisors (see below), whose sum is σ = 1543998690. Its totient is φ = 389038976.

The previous prime is 778077977. The next prime is 778078057. The reversal of 778078016 is 610870877.

It can be written as a sum of positive squares in only one way, i.e., 759553600 + 18524416 = 27560^2 + 4304^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078671 + ... + 6078798.

Almost surely, 2^778078016 is an apocalyptic number.

It is an amenable number.

778078016 is a deficient number, since it is larger than the sum of its proper divisors (765920674).

778078016 is a wasteful number, since it uses less digits than its factorization.

778078016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12157481 (or 12157471 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 778078016 is about 27894.0498314605. The cubic root of 778078016 is about 919.7597104025.

The spelling of 778078016 in words is "seven hundred seventy-eight million, seventy-eight thousand, sixteen".