778223908423 has 16 divisors (see below), whose sum is σ = 867093081120. Its totient is φ = 693504491904.

The previous prime is 778223908421. The next prime is 778223908531. The reversal of 778223908423 is 324809322877.

778223908423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 778223908423 - 2¹ = 778223908421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778223908421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3060765 + ... + 3305257.

It is an arithmetic number, because the mean of its divisors is an integer number (54193317570).

Almost surely, 2^778223908423 is an apocalyptic number.

778223908423 is a deficient number, since it is larger than the sum of its proper divisors (88869172697).

778223908423 is a wasteful number, since it uses less digits than its factorization.

778223908423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252978.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 778223908423 in words is "seven hundred seventy-eight billion, two hundred twenty-three million, nine hundred eight thousand, four hundred twenty-three".