680113020809 has 4 divisors (see below), whose sum is σ = 680398425216. Its totient is φ = 679827616404.

The previous prime is 680113020721. The next prime is 680113020841. The reversal of 680113020809 is 908020311086.

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 680113020809 - 2²⁰ = 680111972233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680113020859) 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, 142698629 + ... + 142703394.

It is an arithmetic number, because the mean of its divisors is an integer number (170099606304).

Almost surely, 2^680113020809 is an apocalyptic number.

It is an amenable number.

680113020809 is a deficient number, since it is larger than the sum of its proper divisors (285404407).

680113020809 is a wasteful number, since it uses less digits than its factorization.

680113020809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285404406.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 680113020809 in words is "six hundred eighty billion, one hundred thirteen million, twenty thousand, eight hundred nine".