685461536 has 36 divisors (see below), whose sum is σ = 1378968318. Its totient is φ = 335404032.

The previous prime is 685461527. The next prime is 685461541. The reversal of 685461536 is 635164586.

It can be written as a sum of positive squares in only one way, i.e., 663371536 + 22090000 = 25756^2 + 4700^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65840 + ... + 75536.

Almost surely, 2^685461536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685461536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689484159).

685461536 is an abundant number, since it is smaller than the sum of its proper divisors (693506782).

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

685461536 is an equidigital number, since it uses as much as digits as its factorization.

685461536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9801 (or 9746 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 685461536 is about 26181.3203639541. The cubic root of 685461536 is about 881.7139186982.

The spelling of 685461536 in words is "six hundred eighty-five million, four hundred sixty-one thousand, five hundred thirty-six".