680737245643 has 16 divisors (see below), whose sum is σ = 837850507200. Its totient is φ = 538592403456.

The previous prime is 680737245641. The next prime is 680737245689. The reversal of 680737245643 is 346542737086.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 680737245643 - 2¹ = 680737245641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680737245641) 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, 5990571 + ... + 6103147.

It is an arithmetic number, because the mean of its divisors is an integer number (52365656700).

Almost surely, 2^680737245643 is an apocalyptic number.

680737245643 is a deficient number, since it is larger than the sum of its proper divisors (157113261557).

680737245643 is a wasteful number, since it uses less digits than its factorization.

680737245643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179046.

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 680737245643 in words is "six hundred eighty billion, seven hundred thirty-seven million, two hundred forty-five thousand, six hundred forty-three".