678560835556 has 24 divisors (see below), whose sum is σ = 1257396048216. Its totient is φ = 319306813440.

The previous prime is 678560835523. The next prime is 678560835569. The reversal of 678560835556 is 655538065876.

It can be written as a sum of positive squares in 4 ways, for example, as 78633133056 + 599927702500 = 280416^2 + 774550^2 .

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 1184140 + ... + 1661116.

It is an arithmetic number, because the mean of its divisors is an integer number (52391502009).

Almost surely, 2^678560835556 is an apocalyptic number.

It is an amenable number.

678560835556 is a deficient number, since it is larger than the sum of its proper divisors (578835212660).

678560835556 is a wasteful number, since it uses less digits than its factorization.

678560835556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497919 (or 497917 counting only the distinct ones).

The product of its (nonzero) digits is 181440000, while the sum is 64.

The spelling of 678560835556 in words is "six hundred seventy-eight billion, five hundred sixty million, eight hundred thirty-five thousand, five hundred fifty-six".