680208838849 has 4 divisors (see below), whose sum is σ = 681019577280. Its totient is φ = 679398100420.

The previous prime is 680208838759. The next prime is 680208838909. The reversal of 680208838849 is 948838802086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 680208838849 - 2²⁹ = 679671967937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680208838549) 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, 405367957 + ... + 405369634.

It is an arithmetic number, because the mean of its divisors is an integer number (170254894320).

Almost surely, 2^680208838849 is an apocalyptic number.

It is an amenable number.

680208838849 is a deficient number, since it is larger than the sum of its proper divisors (810738431).

680208838849 is an equidigital number, since it uses as much as digits as its factorization.

680208838849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810738430.

The product of its (nonzero) digits is 42467328, while the sum is 64.

The spelling of 680208838849 in words is "six hundred eighty billion, two hundred eight million, eight hundred thirty-eight thousand, eight hundred forty-nine".