778722263 has 16 divisors (see below), whose sum is σ = 878625792. Its totient is φ = 683760000.

The previous prime is 778722257. The next prime is 778722289. The reversal of 778722263 is 362227877.

It is not a de Polignac number, because 778722263 - 2¹⁸ = 778460119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778722233) 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, 200288 + ... + 204138.

It is an arithmetic number, because the mean of its divisors is an integer number (54914112).

Almost surely, 2^778722263 is an apocalyptic number.

778722263 is a deficient number, since it is larger than the sum of its proper divisors (99903529).

778722263 is a wasteful number, since it uses less digits than its factorization.

778722263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486.

The product of its digits is 395136, while the sum is 44.

The square root of 778722263 is about 27905.5955499968. The cubic root of 778722263 is about 920.0134934221.

The spelling of 778722263 in words is "seven hundred seventy-eight million, seven hundred twenty-two thousand, two hundred sixty-three".