685557052 has 12 divisors (see below), whose sum is σ = 1200426136. Its totient is φ = 342578160.

The previous prime is 685557017. The next prime is 685557073. The reversal of 685557052 is 250755586.

685557052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42258 + ... + 56185.

Almost surely, 2^685557052 is an apocalyptic number.

It is an amenable number.

685557052 is a deficient number, since it is larger than the sum of its proper divisors (514869084).

685557052 is a wasteful number, since it uses less digits than its factorization.

685557052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100188 (or 100186 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 43.

The square root of 685557052 is about 26183.1444253741. The cubic root of 685557052 is about 881.7548710934.

The spelling of 685557052 in words is "six hundred eighty-five million, five hundred fifty-seven thousand, fifty-two".