85664529 has 6 divisors (see below), whose sum is σ = 123737666. Its totient is φ = 57109680.

The previous prime is 85664497. The next prime is 85664569. The reversal of 85664529 is 92546658.

It can be written as a sum of positive squares in only one way, i.e., 85599504 + 65025 = 9252^2 + 255^2 .

It is not a de Polignac number, because 85664529 - 2⁵ = 85664497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85664569) 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 5 ways as a sum of consecutive naturals, for example, 4759132 + ... + 4759149.

Almost surely, 2^85664529 is an apocalyptic number.

It is an amenable number.

85664529 is a deficient number, since it is larger than the sum of its proper divisors (38073137).

85664529 is a wasteful number, since it uses less digits than its factorization.

85664529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9518287 (or 9518284 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 85664529 is about 9255.5134379461. The cubic root of 85664529 is about 440.8258062242.

The spelling of 85664529 in words is "eighty-five million, six hundred sixty-four thousand, five hundred twenty-nine".