680277915640 has 64 divisors (see below), whose sum is σ = 1652249275200. Its totient is φ = 251305055232.

The previous prime is 680277915631. The next prime is 680277915721. The reversal of 680277915640 is 46519772086.

It is a congruent number.

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, 12722157 + ... + 12775516.

It is an arithmetic number, because the mean of its divisors is an integer number (25816394925).

Almost surely, 2^680277915640 is an apocalyptic number.

It is an amenable number.

680277915640 is an abundant number, since it is smaller than the sum of its proper divisors (971971359560).

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

680277915640 is a wasteful number, since it uses less digits than its factorization.

680277915640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25497736 (or 25497732 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 680277915640 in words is "six hundred eighty billion, two hundred seventy-seven million, nine hundred fifteen thousand, six hundred forty".