680649068452 has 12 divisors (see below), whose sum is σ = 1191243131596. Its totient is φ = 340293888000.

The previous prime is 680649068419. The next prime is 680649068537. The reversal of 680649068452 is 254860946086.

It can be written as a sum of positive squares in 2 ways, for example, as 2951314276 + 677697754176 = 54326^2 + 823224^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7611549 + ... + 7700452.

Almost surely, 2^680649068452 is an apocalyptic number.

It is an amenable number.

680649068452 is a deficient number, since it is larger than the sum of its proper divisors (510594063144).

680649068452 is a wasteful number, since it uses less digits than its factorization.

680649068452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15323118 (or 15323116 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 58.

The spelling of 680649068452 in words is "six hundred eighty billion, six hundred forty-nine million, sixty-eight thousand, four hundred fifty-two".