680645198 has 16 divisors (see below), whose sum is σ = 1050855360. Its totient is φ = 330501600.

The previous prime is 680645183. The next prime is 680645219. The reversal of 680645198 is 891546086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25673 + ... + 44948.

It is an arithmetic number, because the mean of its divisors is an integer number (65678460).

Almost surely, 2^680645198 is an apocalyptic number.

680645198 is a deficient number, since it is larger than the sum of its proper divisors (370210162).

680645198 is a wasteful number, since it uses less digits than its factorization.

680645198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70763.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 680645198 is about 26089.1777946335. The cubic root of 680645198 is about 879.6439666837.

The spelling of 680645198 in words is "six hundred eighty million, six hundred forty-five thousand, one hundred ninety-eight".