680681021589 has 16 divisors (see below), whose sum is σ = 1008524865600. Its totient is φ = 453738505968.

The previous prime is 680681021519. The next prime is 680681021591. The reversal of 680681021589 is 985120186086.

It is a happy number.

It is not a de Polignac number, because 680681021589 - 2¹⁵ = 680680988821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680681021519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1100334 + ... + 1603775.

It is an arithmetic number, because the mean of its divisors is an integer number (63032804100).

Almost surely, 2^680681021589 is an apocalyptic number.

It is an amenable number.

680681021589 is a deficient number, since it is larger than the sum of its proper divisors (327843844011).

680681021589 is a wasteful number, since it uses less digits than its factorization.

680681021589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713441 (or 2713435 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 680681021589 in words is "six hundred eighty billion, six hundred eighty-one million, twenty-one thousand, five hundred eighty-nine".