85636636 has 18 divisors (see below), whose sum is σ = 156667112. Its totient is φ = 40955640.

The previous prime is 85636631. The next prime is 85636637. The reversal of 85636636 is 63663658.

It is a junction number, because it is equal to n+sod(n) for n = 85636592 and 85636601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85636631) 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 5 ways as a sum of consecutive naturals, for example, 18120 + ... + 22351.

Almost surely, 2^85636636 is an apocalyptic number.

It is an amenable number.

85636636 is a deficient number, since it is larger than the sum of its proper divisors (71030476).

85636636 is a wasteful number, since it uses less digits than its factorization.

85636636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40521 (or 40496 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The square root of 85636636 is about 9254.0064836805. The cubic root of 85636636 is about 440.7779556566. Note that the first 3 decimals are identical.

The spelling of 85636636 in words is "eighty-five million, six hundred thirty-six thousand, six hundred thirty-six".