678722389168 has 10 divisors (see below), whose sum is σ = 1315024629044. Its totient is φ = 339361194576.

The previous prime is 678722389097. The next prime is 678722389183. The reversal of 678722389168 is 861983227876.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210074646 + ... + 21210074677.

Almost surely, 2^678722389168 is an apocalyptic number.

It is an amenable number.

678722389168 is a deficient number, since it is larger than the sum of its proper divisors (636302239876).

678722389168 is a wasteful number, since it uses less digits than its factorization.

678722389168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42420149331 (or 42420149325 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 67.

The spelling of 678722389168 in words is "six hundred seventy-eight billion, seven hundred twenty-two million, three hundred eighty-nine thousand, one hundred sixty-eight".