685618250 has 16 divisors (see below), whose sum is σ = 1283477832. Its totient is φ = 274247200.

The previous prime is 685618243. The next prime is 685618259. The reversal of 685618250 is 52816586.

685618250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 398281849 + 287336401 = 19957^2 + 16951^2 .

It is a junction number, because it is equal to n+sod(n) for n = 685618198 and 685618207.

It is not an unprimeable number, because it can be changed into a prime (685618259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1370987 + ... + 1371486.

Almost surely, 2^685618250 is an apocalyptic number.

685618250 is a deficient number, since it is larger than the sum of its proper divisors (597859582).

685618250 is a wasteful number, since it uses less digits than its factorization.

685618250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742490 (or 2742480 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 685618250 is about 26184.3130519019. The cubic root of 685618250 is about 881.7811076791.

The spelling of 685618250 in words is "six hundred eighty-five million, six hundred eighteen thousand, two hundred fifty".