680521821560 has 48 divisors (see below), whose sum is σ = 1781161711560. Its totient is φ = 233321766720.

The previous prime is 680521821541. The next prime is 680521821587. The reversal of 680521821560 is 65128125086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173600546 + ... + 173604465.

Almost surely, 2^680521821560 is an apocalyptic number.

It is an amenable number.

680521821560 is an abundant number, since it is smaller than the sum of its proper divisors (1100639890000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680521821560 is a wasteful number, since it uses less digits than its factorization.

680521821560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347205036 (or 347205025 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 680521821560 in words is "six hundred eighty billion, five hundred twenty-one million, eight hundred twenty-one thousand, five hundred sixty".