680308545 has 32 divisors (see below), whose sum is σ = 1253514240. Its totient is φ = 308617920.

The previous prime is 680308543. The next prime is 680308619. The reversal of 680308545 is 545803086.

It is a happy number.

It is not a de Polignac number, because 680308545 - 2¹ = 680308543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680308543) 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 31 ways as a sum of consecutive naturals, for example, 10975 + ... + 38484.

It is an arithmetic number, because the mean of its divisors is an integer number (39172320).

Almost surely, 2^680308545 is an apocalyptic number.

It is an amenable number.

680308545 is a deficient number, since it is larger than the sum of its proper divisors (573205695).

680308545 is a wasteful number, since it uses less digits than its factorization.

680308545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49605.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 680308545 is about 26082.7250301804. The cubic root of 680308545 is about 879.4989162628.

The spelling of 680308545 in words is "six hundred eighty million, three hundred eight thousand, five hundred forty-five".