680208785573 has 4 divisors (see below), whose sum is σ = 680256430188. Its totient is φ = 680161140960.

The previous prime is 680208785569. The next prime is 680208785611. The reversal of 680208785573 is 375587802086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72373374529 + 607835411044 = 269023^2 + 779638^2 .

It is a cyclic number.

It is not a de Polignac number, because 680208785573 - 2² = 680208785569 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680208782573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23800886 + ... + 23829447.

It is an arithmetic number, because the mean of its divisors is an integer number (170064107547).

Almost surely, 2^680208785573 is an apocalyptic number.

It is an amenable number.

680208785573 is a deficient number, since it is larger than the sum of its proper divisors (47644615).

680208785573 is a wasteful number, since it uses less digits than its factorization.

680208785573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47644614.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 680208785573 in words is "six hundred eighty billion, two hundred eight million, seven hundred eighty-five thousand, five hundred seventy-three".