485805681 has 45 divisors (see below), whose sum is σ = 759487113. Its totient is φ = 309455640.

The previous prime is 485805653. The next prime is 485805707. The reversal of 485805681 is 186508584.

The square root of 485805681 is 22041.

It is a perfect power (a square), and thus also a powerful number.

485805681 is a `hidden beast` number, since 4 + 8 + 5 + 80 + 568 + 1 = 666.

It is not a de Polignac number, because 485805681 - 2⁷ = 485805553 is a prime.

It is a super-2 number, since 2×485805681² = 472014319383747522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (485805181) 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 44 ways as a sum of consecutive naturals, for example, 6149400 + ... + 6149478.

Almost surely, 2^485805681 is an apocalyptic number.

485805681 is the 22041-st square number.

485805681 is the 11021-st centered octagonal number.

It is an amenable number.

485805681 is a deficient number, since it is larger than the sum of its proper divisors (273681432).

485805681 is an frugal number, since it uses more digits than its factorization.

485805681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 113 counting only the distinct ones).

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

The cubic root of 485805681 is about 786.1176183172.

The spelling of 485805681 in words is "four hundred eighty-five million, eight hundred five thousand, six hundred eighty-one".