678484486918 has 24 divisors (see below), whose sum is σ = 1184245623000. Its totient is φ = 290690785728.

The previous prime is 678484486859. The next prime is 678484486919. The reversal of 678484486918 is 819684484876.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678484486919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 726003 + ... + 1372606.

It is an arithmetic number, because the mean of its divisors is an integer number (49343567625).

Almost surely, 2^678484486918 is an apocalyptic number.

678484486918 is a deficient number, since it is larger than the sum of its proper divisors (505761136082).

678484486918 is a wasteful number, since it uses less digits than its factorization.

678484486918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101924 (or 2101917 counting only the distinct ones).

The product of its digits is 594542592, while the sum is 73.

The spelling of 678484486918 in words is "six hundred seventy-eight billion, four hundred eighty-four million, four hundred eighty-six thousand, nine hundred eighteen".