80685605 has 80 divisors (see below), whose sum is σ = 135523584. Its totient is φ = 45440640.

The previous prime is 80685599. The next prime is 80685617. The reversal of 80685605 is 50658608.

It is not a de Polignac number, because 80685605 - 2⁴ = 80685589 is a prime.

It is a super-3 number, since 3×80685605³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 1716692 + ... + 1716738.

Almost surely, 2^80685605 is an apocalyptic number.

It is an amenable number.

80685605 is a deficient number, since it is larger than the sum of its proper divisors (54837979).

80685605 is a wasteful number, since it uses less digits than its factorization.

80685605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 80685605 is about 8982.5166295421. The cubic root of 80685605 is about 432.1143476595.

The spelling of 80685605 in words is "eighty million, six hundred eighty-five thousand, six hundred five".