71636065 has 16 divisors (see below), whose sum is σ = 89293248. Its totient is φ = 55129536.

The previous prime is 71636041. The next prime is 71636087. The reversal of 71636065 is 56063617.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71636065 - 2¹⁵ = 71603297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71636065.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11919 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (5580828).

Almost surely, 2^71636065 is an apocalyptic number.

It is an amenable number.

71636065 is a deficient number, since it is larger than the sum of its proper divisors (17657183).

71636065 is a wasteful number, since it uses less digits than its factorization.

71636065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 71636065 is about 8463.8091306456. The cubic root of 71636065 is about 415.3146401815.

The spelling of 71636065 in words is "seventy-one million, six hundred thirty-six thousand, sixty-five".