678446168556 has 48 divisors (see below), whose sum is σ = 1759807443968. Its totient is φ = 202018708800.

The previous prime is 678446168531. The next prime is 678446168593. The reversal of 678446168556 is 655861644876.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70140550 + ... + 70150221.

Almost surely, 2^678446168556 is an apocalyptic number.

It is an amenable number.

678446168556 is an abundant number, since it is smaller than the sum of its proper divisors (1081361275412).

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

678446168556 is a wasteful number, since it uses less digits than its factorization.

678446168556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140290822 (or 140290820 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 66.

The spelling of 678446168556 in words is "six hundred seventy-eight billion, four hundred forty-six million, one hundred sixty-eight thousand, five hundred fifty-six".