680110561 has 4 divisors (see below), whose sum is σ = 732426772. Its totient is φ = 627794352.

The previous prime is 680110547. The next prime is 680110637. The reversal of 680110561 is 165011086.

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 371756961 + 308353600 = 19281^2 + 17560^2 .

It is a cyclic number.

It is not a de Polignac number, because 680110561 - 2⁷ = 680110433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680110861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26158086 + ... + 26158111.

It is an arithmetic number, because the mean of its divisors is an integer number (183106693).

Almost surely, 2^680110561 is an apocalyptic number.

It is an amenable number.

680110561 is a deficient number, since it is larger than the sum of its proper divisors (52316211).

680110561 is a wasteful number, since it uses less digits than its factorization.

680110561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52316210.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 680110561 is about 26078.9294450520. The cubic root of 680110561 is about 879.4135904651.

The spelling of 680110561 in words is "six hundred eighty million, one hundred ten thousand, five hundred sixty-one".