680555519 has 16 divisors (see below), whose sum is σ = 791032320. Its totient is φ = 573441120.

The previous prime is 680555507. The next prime is 680555569. The reversal of 680555519 is 915555086.

It is not a de Polignac number, because 680555519 - 2⁴ = 680555503 is a prime.

It is a super-2 number, since 2×680555519² = 926311628882718722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 680555519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680555569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186557 + ... + 190169.

It is an arithmetic number, because the mean of its divisors is an integer number (49439520).

Almost surely, 2^680555519 is an apocalyptic number.

680555519 is a deficient number, since it is larger than the sum of its proper divisors (110476801).

680555519 is a wasteful number, since it uses less digits than its factorization.

680555519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070.

The product of its (nonzero) digits is 270000, while the sum is 44.

The square root of 680555519 is about 26087.4590368629. The cubic root of 680555519 is about 879.6053322349.

The spelling of 680555519 in words is "six hundred eighty million, five hundred fifty-five thousand, five hundred nineteen".