685810125 has 384 divisors, whose sum is σ = 1792627200. Its totient is φ = 254016000.

The previous prime is 685810121. The next prime is 685810171. The reversal of 685810125 is 521018586.

685810125 is a `hidden beast` number, since 68 + 581 + 0 + 12 + 5 = 666.

It is not a de Polignac number, because 685810125 - 2² = 685810121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685810125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685810121) 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 383 ways as a sum of consecutive naturals, for example, 23648611 + ... + 23648639.

It is an arithmetic number, because the mean of its divisors is an integer number (4668300).

Almost surely, 2^685810125 is an apocalyptic number.

685810125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

685810125 is an abundant number, since it is smaller than the sum of its proper divisors (1106817075).

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

685810125 is a wasteful number, since it uses less digits than its factorization.

685810125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 685810125 is about 26187.9767259710. The cubic root of 685810125 is about 881.8633575168.

The spelling of 685810125 in words is "six hundred eighty-five million, eight hundred ten thousand, one hundred twenty-five".