71218914646727 has 4 divisors (see below), whose sum is σ = 71269821663600. Its totient is φ = 71168007629856.

The previous prime is 71218914646717. The next prime is 71218914646753. The reversal of 71218914646727 is 72764641981217.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71218914646727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71218914646717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25453506338 + ... + 25453509135.

It is an arithmetic number, because the mean of its divisors is an integer number (17817455415900).

Almost surely, 2^{71218914646727} is an apocalyptic number.

71218914646727 is a deficient number, since it is larger than the sum of its proper divisors (50907016873).

71218914646727 is a wasteful number, since it uses less digits than its factorization.

71218914646727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50907016872.

The product of its digits is 56899584, while the sum is 65.

The spelling of 71218914646727 in words is "seventy-one trillion, two hundred eighteen billion, nine hundred fourteen million, six hundred forty-six thousand, seven hundred twenty-seven".