71536811 has 4 divisors (see below), whose sum is σ = 71932224. Its totient is φ = 71141400.

The previous prime is 71536769. The next prime is 71536819. The reversal of 71536811 is 11863517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11863517 = 193 ⋅61469.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71536811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71536819) 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 3 ways as a sum of consecutive naturals, for example, 197435 + ... + 197796.

It is an arithmetic number, because the mean of its divisors is an integer number (17983056).

Almost surely, 2^71536811 is an apocalyptic number.

71536811 is a deficient number, since it is larger than the sum of its proper divisors (395413).

71536811 is a wasteful number, since it uses less digits than its factorization.

71536811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395412.

The product of its digits is 5040, while the sum is 32.

The square root of 71536811 is about 8457.9436626168. The cubic root of 71536811 is about 415.1227410689.

The spelling of 71536811 in words is "seventy-one million, five hundred thirty-six thousand, eight hundred eleven".