71018360065 has 4 divisors (see below), whose sum is σ = 85222032084. Its totient is φ = 56814688048.

The previous prime is 71018360053. The next prime is 71018360089. The reversal of 71018360065 is 56006381017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28073672704 + 42944687361 = 167552^2 + 207231^2 .

It is a cyclic number.

It is not a de Polignac number, because 71018360065 - 2¹¹ = 71018358017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 7101836002 + ... + 7101836011.

It is an arithmetic number, because the mean of its divisors is an integer number (21305508021).

Almost surely, 2^71018360065 is an apocalyptic number.

It is an amenable number.

71018360065 is a deficient number, since it is larger than the sum of its proper divisors (14203672019).

71018360065 is a wasteful number, since it uses less digits than its factorization.

71018360065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14203672018.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 71018360065 in words is "seventy-one billion, eighteen million, three hundred sixty thousand, sixty-five".