85545590 has 16 divisors (see below), whose sum is σ = 165827088. Its totient is φ = 31586016.

The previous prime is 85545589. The next prime is 85545599. The reversal of 85545590 is 9554558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85545599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328892 + ... + 329151.

It is an arithmetic number, because the mean of its divisors is an integer number (10364193).

Almost surely, 2^85545590 is an apocalyptic number.

85545590 is a deficient number, since it is larger than the sum of its proper divisors (80281498).

85545590 is a wasteful number, since it uses less digits than its factorization.

85545590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658063.

The product of its (nonzero) digits is 180000, while the sum is 41.

The square root of 85545590 is about 9249.0859007796. The cubic root of 85545590 is about 440.6216934849.

The spelling of 85545590 in words is "eighty-five million, five hundred forty-five thousand, five hundred ninety".