685085481 has 12 divisors (see below), whose sum is σ = 990895360. Its totient is φ = 456111000.

The previous prime is 685085477. The next prime is 685085491. The reversal of 685085481 is 184580586.

685085481 is a `hidden beast` number, since 68 + 508 + 5 + 4 + 81 = 666.

It is not a de Polignac number, because 685085481 - 2² = 685085477 is a prime.

It is a super-2 number, since 2×685085481² = 938684232554002722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685085491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43921 + ... + 57438.

Almost surely, 2^685085481 is an apocalyptic number.

It is an amenable number.

685085481 is a deficient number, since it is larger than the sum of its proper divisors (305809879).

685085481 is a wasteful number, since it uses less digits than its factorization.

685085481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102116 (or 102113 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The square root of 685085481 is about 26174.1376362240. The cubic root of 685085481 is about 881.5526484863.

The spelling of 685085481 in words is "six hundred eighty-five million, eighty-five thousand, four hundred eighty-one".