685135552 has 28 divisors (see below), whose sum is σ = 1372285800. Its totient is φ = 339362816.

The previous prime is 685135537. The next prime is 685135559. The reversal of 685135552 is 255531586.

It is a super-2 number, since 2×685135552² = 938821449228689408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685135559) 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 3 ways as a sum of consecutive naturals, for example, 43177 + ... + 56872.

Almost surely, 2^685135552 is an apocalyptic number.

It is an amenable number.

685135552 is an abundant number, since it is smaller than the sum of its proper divisors (687150248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685135552 is a wasteful number, since it uses less digits than its factorization.

685135552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100168 (or 100158 counting only the distinct ones).

The product of its digits is 180000, while the sum is 40.

The square root of 685135552 is about 26175.0941163542. The cubic root of 685135552 is about 881.5741247101.

The spelling of 685135552 in words is "six hundred eighty-five million, one hundred thirty-five thousand, five hundred fifty-two".