85557489 has 16 divisors (see below), whose sum is σ = 118003200. Its totient is φ = 55082880.

The previous prime is 85557473. The next prime is 85557499. The reversal of 85557489 is 98475558.

It is not a de Polignac number, because 85557489 - 2⁴ = 85557473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85557449) 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 15 ways as a sum of consecutive naturals, for example, 81037 + ... + 82085.

It is an arithmetic number, because the mean of its divisors is an integer number (7375200).

Almost surely, 2^85557489 is an apocalyptic number.

It is an amenable number.

85557489 is a deficient number, since it is larger than the sum of its proper divisors (32445711).

85557489 is a wasteful number, since it uses less digits than its factorization.

85557489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its digits is 2016000, while the sum is 51.

The square root of 85557489 is about 9249.7291311692. The cubic root of 85557489 is about 440.6421220247.

The spelling of 85557489 in words is "eighty-five million, five hundred fifty-seven thousand, four hundred eighty-nine".