682809393651856 has 10 divisors (see below), whose sum is σ = 1322943200200502. Its totient is φ = 341404696825920.

The previous prime is 682809393651839. The next prime is 682809393651857. The reversal of 682809393651856 is 658156393908286.

It can be written as a sum of positive squares in only one way, i.e., 618063553261456 + 64745840390400 = 24860884^2 + 8046480^2 .

It is not an unprimeable number, because it can be changed into a prime (682809393651857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21337793551605 + ... + 21337793551636.

Almost surely, 2^{682809393651856} is an apocalyptic number.

It is an amenable number.

682809393651856 is a deficient number, since it is larger than the sum of its proper divisors (640133806548646).

682809393651856 is a wasteful number, since it uses less digits than its factorization.

682809393651856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42675587103249 (or 42675587103243 counting only the distinct ones).

The product of its (nonzero) digits is 4031078400, while the sum is 79.

The spelling of 682809393651856 in words is "six hundred eighty-two trillion, eight hundred nine billion, three hundred ninety-three million, six hundred fifty-one thousand, eight hundred fifty-six".