682556866388 has 12 divisors (see below), whose sum is σ = 1194730160820. Its totient is φ = 341205391872.

The previous prime is 682556866337. The next prime is 682556866421. The reversal of 682556866388 is 883668655286.

It can be written as a sum of positive squares in 2 ways, for example, as 597346585924 + 85210280464 = 772882^2 + 291908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18239303 + ... + 18276686.

It is an arithmetic number, because the mean of its divisors is an integer number (99560846735).

Almost surely, 2^682556866388 is an apocalyptic number.

It is an amenable number.

682556866388 is a deficient number, since it is larger than the sum of its proper divisors (512173294432).

682556866388 is a wasteful number, since it uses less digits than its factorization.

682556866388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36520666 (or 36520664 counting only the distinct ones).

The product of its digits is 796262400, while the sum is 71.

The spelling of 682556866388 in words is "six hundred eighty-two billion, five hundred fifty-six million, eight hundred sixty-six thousand, three hundred eighty-eight".