680603028861 has 32 divisors (see below), whose sum is σ = 1041666379776. Its totient is φ = 387209160000.

The previous prime is 680603028857. The next prime is 680603028961. The reversal of 680603028861 is 168820306086.

It is not a de Polignac number, because 680603028861 - 2² = 680603028857 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 680603028861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680603028961) 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 31 ways as a sum of consecutive naturals, for example, 8216431 + ... + 8298851.

It is an arithmetic number, because the mean of its divisors is an integer number (32552074368).

Almost surely, 2^680603028861 is an apocalyptic number.

It is an amenable number.

680603028861 is a deficient number, since it is larger than the sum of its proper divisors (361063350915).

680603028861 is a wasteful number, since it uses less digits than its factorization.

680603028861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84153.

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 680603028861 in words is "six hundred eighty billion, six hundred three million, twenty-eight thousand, eight hundred sixty-one".