680320545 has 8 divisors (see below), whose sum is σ = 1088512896. Its totient is φ = 362837616.

The previous prime is 680320523. The next prime is 680320549. The reversal of 680320545 is 545023086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 680320545 - 2¹¹ = 680318497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680320549) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22677337 + ... + 22677366.

It is an arithmetic number, because the mean of its divisors is an integer number (136064112).

Almost surely, 2^680320545 is an apocalyptic number.

It is an amenable number.

680320545 is a deficient number, since it is larger than the sum of its proper divisors (408192351).

680320545 is a wasteful number, since it uses less digits than its factorization.

680320545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45354711.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 680320545 is about 26082.9550664797. The cubic root of 680320545 is about 879.5040874090.

The spelling of 680320545 in words is "six hundred eighty million, three hundred twenty thousand, five hundred forty-five".