680285005520 has 40 divisors (see below), whose sum is σ = 1588569504360. Its totient is φ = 270925724160.

The previous prime is 680285005513. The next prime is 680285005553. The reversal of 680285005520 is 25500582086.

It can be written as a sum of positive squares in 4 ways, for example, as 268896176704 + 411388828816 = 518552^2 + 641396^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18548411 + ... + 18585050.

It is an arithmetic number, because the mean of its divisors is an integer number (39714237609).

Almost surely, 2^680285005520 is an apocalyptic number.

It is an amenable number.

680285005520 is an abundant number, since it is smaller than the sum of its proper divisors (908284498840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680285005520 is a wasteful number, since it uses less digits than its factorization.

680285005520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37133703 (or 37133697 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 41.

The spelling of 680285005520 in words is "six hundred eighty billion, two hundred eighty-five million, five thousand, five hundred twenty".