778368871 has 16 divisors (see below), whose sum is σ = 909664000. Its totient is φ = 665744184.

The previous prime is 778368869. The next prime is 778368881. The reversal of 778368871 is 178863877.

It is not a de Polignac number, because 778368871 - 2¹ = 778368869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778368841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177220 + ... + 181558.

It is an arithmetic number, because the mean of its divisors is an integer number (56854000).

Almost surely, 2^778368871 is an apocalyptic number.

778368871 is a deficient number, since it is larger than the sum of its proper divisors (131295129).

778368871 is an equidigital number, since it uses as much as digits as its factorization.

778368871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4883 (or 4869 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 55.

The square root of 778368871 is about 27899.2629114104. The cubic root of 778368871 is about 919.8743019037.

The spelling of 778368871 in words is "seven hundred seventy-eight million, three hundred sixty-eight thousand, eight hundred seventy-one".