808791368778 has 48 divisors (see below), whose sum is σ = 1783540525416. Its totient is φ = 264815464320.

The previous prime is 808791368753. The next prime is 808791368779. The reversal of 808791368778 is 877863197808.

It can be written as a sum of positive squares in 4 ways, for example, as 807674271849 + 1117096929 = 898707^2 + 33423^2 .

It is not an unprimeable number, because it can be changed into a prime (808791368779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302376 + ... + 1307292.

Almost surely, 2^808791368778 is an apocalyptic number.

808791368778 is an abundant number, since it is smaller than the sum of its proper divisors (974749156638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

808791368778 is a wasteful number, since it uses less digits than its factorization.

808791368778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005719 (or 1005716 counting only the distinct ones).

The product of its (nonzero) digits is 227598336, while the sum is 72.

The spelling of 808791368778 in words is "eight hundred eight billion, seven hundred ninety-one million, three hundred sixty-eight thousand, seven hundred seventy-eight".