678734475312 has 30 divisors (see below), whose sum is σ = 1753412139892. Its totient is φ = 226242922496.

The previous prime is 678734475257. The next prime is 678734475313. The reversal of 678734475312 is 213574437876.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (678734475313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5648368 + ... + 5767280.

Almost surely, 2^678734475312 is an apocalyptic number.

It is an amenable number.

678734475312 is an abundant number, since it is smaller than the sum of its proper divisors (1074677664580).

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

678734475312 is an frugal number, since it uses more digits than its factorization.

678734475312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237837 (or 118918 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 57.

The spelling of 678734475312 in words is "six hundred seventy-eight billion, seven hundred thirty-four million, four hundred seventy-five thousand, three hundred twelve".