685585152 has 108 divisors (see below), whose sum is σ = 2259151440. Its totient is φ = 195876864.

The previous prime is 685585111. The next prime is 685585169. The reversal of 685585152 is 251585586.

685585152 is a `hidden beast` number, since 6 + 85 + 58 + 515 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 685585098 and 685585107.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5127 + ... + 37382.

Almost surely, 2^685585152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685585152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129575720).

685585152 is an abundant number, since it is smaller than the sum of its proper divisors (1573566288).

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

685585152 is a wasteful number, since it uses less digits than its factorization.

685585152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42538 (or 42521 counting only the distinct ones).

The product of its digits is 480000, while the sum is 45.

The square root of 685585152 is about 26183.6810246382. The cubic root of 685585152 is about 881.7669182179.

The spelling of 685585152 in words is "six hundred eighty-five million, five hundred eighty-five thousand, one hundred fifty-two".