85005556 has 6 divisors (see below), whose sum is σ = 148759730. Its totient is φ = 42502776.

The previous prime is 85005553. The next prime is 85005617. The reversal of 85005556 is 65550058.

It can be written as a sum of positive squares in only one way, i.e., 83356900 + 1648656 = 9130^2 + 1284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85005551) 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 as a sum of consecutive naturals, namely, 10625691 + ... + 10625698.

Almost surely, 2^85005556 is an apocalyptic number.

It is an amenable number.

85005556 is a deficient number, since it is larger than the sum of its proper divisors (63754174).

85005556 is a wasteful number, since it uses less digits than its factorization.

85005556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21251393 (or 21251391 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

The square root of 85005556 is about 9219.8457687751. The cubic root of 85005556 is about 439.6925469230.

The spelling of 85005556 in words is "eighty-five million, five thousand, five hundred fifty-six".