685625814 has 24 divisors (see below), whose sum is σ = 1550111472. Its totient is φ = 218605200.

The previous prime is 685625803. The next prime is 685625819. The reversal of 685625814 is 418526586.

685625814 is a `hidden beast` number, since 6 + 8 + 5 + 62 + 581 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 685625814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685625819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 827637 + ... + 828464.

It is an arithmetic number, because the mean of its divisors is an integer number (64587978).

Almost surely, 2^685625814 is an apocalyptic number.

685625814 is an abundant number, since it is smaller than the sum of its proper divisors (864485658).

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

685625814 is a wasteful number, since it uses less digits than its factorization.

685625814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656132 (or 1656129 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 685625814 is about 26184.4574891289. The cubic root of 685625814 is about 881.7843503815.

The spelling of 685625814 in words is "six hundred eighty-five million, six hundred twenty-five thousand, eight hundred fourteen".