680904822578 has 18 divisors (see below), whose sum is σ = 1029108444861. Its totient is φ = 337888003504.

The previous prime is 680904822541. The next prime is 680904822581. The reversal of 680904822578 is 875228409086.

It can be written as a sum of positive squares in 2 ways, for example, as 675662628169 + 5242194409 = 821987^2 + 72403^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=583483.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 159872213 + ... + 159876471.

Almost surely, 2^680904822578 is an apocalyptic number.

680904822578 is a deficient number, since it is larger than the sum of its proper divisors (348203622283).

680904822578 is an frugal number, since it uses more digits than its factorization.

680904822578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8794 (or 4398 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 680904822578 in words is "six hundred eighty billion, nine hundred four million, eight hundred twenty-two thousand, five hundred seventy-eight".