680430645 has 32 divisors (see below), whose sum is σ = 1216938240. Its totient is φ = 360711360.

The previous prime is 680430533. The next prime is 680430719. The reversal of 680430645 is 546034086.

680430645 is a `hidden beast` number, since 6 + 8 + 0 + 4 + 3 + 0 + 645 = 666.

It is not a de Polignac number, because 680430645 - 2¹⁵ = 680397877 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 7455 + ... + 37635.

It is an arithmetic number, because the mean of its divisors is an integer number (38029320).

Almost surely, 2^680430645 is an apocalyptic number.

It is an amenable number.

680430645 is a deficient number, since it is larger than the sum of its proper divisors (536507595).

680430645 is a wasteful number, since it uses less digits than its factorization.

680430645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30362 (or 30356 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 680430645 is about 26085.0655548342. The cubic root of 680430645 is about 879.5515298377.

The spelling of 680430645 in words is "six hundred eighty million, four hundred thirty thousand, six hundred forty-five".