685792516 has 6 divisors (see below), whose sum is σ = 1200136910. Its totient is φ = 342896256.

The previous prime is 685792511. The next prime is 685792519. The reversal of 685792516 is 615297586.

It can be written as a sum of positive squares in only one way, i.e., 678394116 + 7398400 = 26046^2 + 2720^2 .

It is a super-2 number, since 2×685792516² = 940622750003220512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685792516.

It is not an unprimeable number, because it can be changed into a prime (685792511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85724061 + ... + 85724068.

Almost surely, 2^685792516 is an apocalyptic number.

It is an amenable number.

685792516 is a deficient number, since it is larger than the sum of its proper divisors (514344394).

685792516 is a wasteful number, since it uses less digits than its factorization.

685792516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171448133 (or 171448131 counting only the distinct ones).

The product of its digits is 907200, while the sum is 49.

The square root of 685792516 is about 26187.6405199094. The cubic root of 685792516 is about 881.8558098180.

The spelling of 685792516 in words is "six hundred eighty-five million, seven hundred ninety-two thousand, five hundred sixteen".