680591221191 has 72 divisors (see below), whose sum is σ = 1206566150400. Its totient is φ = 367583559840.

The previous prime is 680591221187. The next prime is 680591221199. The reversal of 680591221191 is 191122195086.

It is not a de Polignac number, because 680591221191 - 2² = 680591221187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680591221199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3517120 + ... + 3705578.

It is an arithmetic number, because the mean of its divisors is an integer number (16757863200).

Almost surely, 2^680591221191 is an apocalyptic number.

680591221191 is a deficient number, since it is larger than the sum of its proper divisors (525974929209).

680591221191 is a wasteful number, since it uses less digits than its factorization.

680591221191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188929 (or 188919 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 45.

The spelling of 680591221191 in words is "six hundred eighty billion, five hundred ninety-one million, two hundred twenty-one thousand, one hundred ninety-one".