85005681 has 8 divisors (see below), whose sum is σ = 113544480. Its totient is φ = 56568672.

The previous prime is 85005667. The next prime is 85005703. The reversal of 85005681 is 18650058.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85005681 - 2⁵ = 85005649 is a prime.

It is a super-2 number, since 2×85005681² = 14451931604547522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85005881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23476 + ... + 26853.

It is an arithmetic number, because the mean of its divisors is an integer number (14193060).

Almost surely, 2^85005681 is an apocalyptic number.

It is an amenable number.

85005681 is a deficient number, since it is larger than the sum of its proper divisors (28538799).

85005681 is a wasteful number, since it uses less digits than its factorization.

85005681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50895.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 85005681 is about 9219.8525476279. The cubic root of 85005681 is about 439.6927624444.

The spelling of 85005681 in words is "eighty-five million, five thousand, six hundred eighty-one".