680446461685 has 12 divisors (see below), whose sum is σ = 823015892268. Its totient is φ = 540070828416.

The previous prime is 680446461679. The next prime is 680446461689. The reversal of 680446461685 is 586164644086.

It can be written as a sum of positive squares in 2 ways, for example, as 502559059396 + 177887402289 = 708914^2 + 421767^2 .

It is not a de Polignac number, because 680446461685 - 2¹⁹ = 680445937397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680446461689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4138132 + ... + 4299421.

It is an arithmetic number, because the mean of its divisors is an integer number (68584657689).

Almost surely, 2^680446461685 is an apocalyptic number.

It is an amenable number.

680446461685 is a deficient number, since it is larger than the sum of its proper divisors (142569430583).

680446461685 is an equidigital number, since it uses as much as digits as its factorization.

680446461685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8437812 (or 8437685 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 58.

The spelling of 680446461685 in words is "six hundred eighty billion, four hundred forty-six million, four hundred sixty-one thousand, six hundred eighty-five".