685548625 has 8 divisors (see below), whose sum is σ = 855564840. Its totient is φ = 548438800.

The previous prime is 685548593. The next prime is 685548629. The reversal of 685548625 is 526845586.

It can be written as a sum of positive squares in 4 ways, for example, as 82011136 + 603537489 = 9056^2 + 24567^2 .

It is not a de Polignac number, because 685548625 - 2⁵ = 685548593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685548629) 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 7 ways as a sum of consecutive naturals, for example, 2742070 + ... + 2742319.

It is an arithmetic number, because the mean of its divisors is an integer number (106945605).

Almost surely, 2^685548625 is an apocalyptic number.

It is an amenable number.

685548625 is a deficient number, since it is larger than the sum of its proper divisors (170016215).

685548625 is an equidigital number, since it uses as much as digits as its factorization.

685548625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484404 (or 5484394 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 49.

The square root of 685548625 is about 26182.9835007396. The cubic root of 685548625 is about 881.7512581781.

The spelling of 685548625 in words is "six hundred eighty-five million, five hundred forty-eight thousand, six hundred twenty-five".