678423444345 has 16 divisors (see below), whose sum is σ = 1206086123520. Its totient is φ = 361825836912.

The previous prime is 678423444331. The next prime is 678423444353. The reversal of 678423444345 is 543444324876.

678423444345 is a `hidden beast` number, since 67 + 8 + 4 + 234 + 4 + 4 + 345 = 666.

It is not a de Polignac number, because 678423444345 - 2³⁰ = 677349702521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678423444291 and 678423444300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2512679289 + ... + 2512679558.

It is an arithmetic number, because the mean of its divisors is an integer number (75380382720).

Almost surely, 2^678423444345 is an apocalyptic number.

It is an amenable number.

678423444345 is a deficient number, since it is larger than the sum of its proper divisors (527662679175).

678423444345 is a wasteful number, since it uses less digits than its factorization.

678423444345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025358861 (or 5025358855 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 54.

The spelling of 678423444345 in words is "six hundred seventy-eight billion, four hundred twenty-three million, four hundred forty-four thousand, three hundred forty-five".