679559517316 has 81 divisors (see below), whose sum is σ = 1257570323373. Its totient is φ = 321300215040.

The previous prime is 679559517313. The next prime is 679559517331. The reversal of 679559517316 is 613715955976.

The square root of 679559517316 is 824354.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 671039488900 + 8520028416 = 819170^2 + 92304^2 .

It is a super-2 number, since 2×679559517316² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679559517313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2916564336 + ... + 2916564568.

Almost surely, 2^679559517316 is an apocalyptic number.

679559517316 is the 824354-th square number.

It is an amenable number.

679559517316 is a deficient number, since it is larger than the sum of its proper divisors (578010806057).

679559517316 is an equidigital number, since it uses as much as digits as its factorization.

679559517316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 325 counting only the distinct ones).

The product of its digits is 53581500, while the sum is 64.

Multiplying 679559517316 by its sum of digits (64), we get a square (43491809108224 = 6594832²).

The spelling of 679559517316 in words is "six hundred seventy-nine billion, five hundred fifty-nine million, five hundred seventeen thousand, three hundred sixteen".