680440448842 has 32 divisors (see below), whose sum is σ = 1277973500544. Its totient is φ = 263968857600.

The previous prime is 680440448813. The next prime is 680440448899. The reversal of 680440448842 is 248844044086.

It is a self number, because there is not a number n which added to its sum of digits gives 680440448842.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9445759 + ... + 9517522.

It is an arithmetic number, because the mean of its divisors is an integer number (39936671892).

Almost surely, 2^680440448842 is an apocalyptic number.

680440448842 is a deficient number, since it is larger than the sum of its proper divisors (597533051702).

680440448842 is a wasteful number, since it uses less digits than its factorization.

680440448842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18963534.

The product of its (nonzero) digits is 6291456, while the sum is 52.

The spelling of 680440448842 in words is "six hundred eighty billion, four hundred forty million, four hundred forty-eight thousand, eight hundred forty-two".