778152868 has 12 divisors (see below), whose sum is σ = 1390741632. Its totient is φ = 380798120.

The previous prime is 778152857. The next prime is 778152887. The reversal of 778152868 is 868251877.

It is a happy number.

778152868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069368 + ... + 2069743.

It is an arithmetic number, because the mean of its divisors is an integer number (115895136).

Almost surely, 2^778152868 is an apocalyptic number.

It is an amenable number.

778152868 is a deficient number, since it is larger than the sum of its proper divisors (612588764).

778152868 is a wasteful number, since it uses less digits than its factorization.

778152868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139162 (or 4139160 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 52.

The square root of 778152868 is about 27895.3915190305. The cubic root of 778152868 is about 919.7892034374.

Subtracting 778152868 from its reverse (868251877), we obtain a palindrome (90099009).

The spelling of 778152868 in words is "seven hundred seventy-eight million, one hundred fifty-two thousand, eight hundred sixty-eight".