680285005521 has 32 divisors (see below), whose sum is σ = 1003611949056. Its totient is φ = 406418208000.

The previous prime is 680285005513. The next prime is 680285005553. The reversal of 680285005521 is 125500582086.

It is not a de Polignac number, because 680285005521 - 2³ = 680285005513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680285005511) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 16077625 + ... + 16119881.

It is an arithmetic number, because the mean of its divisors is an integer number (31362873408).

Almost surely, 2^680285005521 is an apocalyptic number.

It is an amenable number.

680285005521 is a deficient number, since it is larger than the sum of its proper divisors (323326943535).

680285005521 is a wasteful number, since it uses less digits than its factorization.

680285005521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49213.

The product of its (nonzero) digits is 192000, while the sum is 42.

The spelling of 680285005521 in words is "six hundred eighty billion, two hundred eighty-five million, five thousand, five hundred twenty-one".