71636 has 6 divisors (see below), whose sum is σ = 125370. Its totient is φ = 35816.

The previous prime is 71633. The next prime is 71647. The reversal of 71636 is 63617.

It can be written as a sum of positive squares in only one way, i.e., 59536 + 12100 = 244^2 + 110^2 .

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8951 + ... + 8958.

It is an arithmetic number, because the mean of its divisors is an integer number (20895).

2⁷¹⁶³⁶ is an apocalyptic number.

It is an amenable number.

71636 is a deficient number, since it is larger than the sum of its proper divisors (53734).

71636 is a wasteful number, since it uses less digits than its factorization.

71636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17913 (or 17911 counting only the distinct ones).

The product of its digits is 756, while the sum is 23.

The square root of 71636 is about 267.6490239100. The cubic root of 71636 is about 41.5314514568.

It can be divided in two parts, 71 and 636, that added together give a palindrome (707).

The spelling of 71636 in words is "seventy-one thousand, six hundred thirty-six".