71138602717 has 32 divisors (see below), whose sum is σ = 88750368000. Its totient is φ = 55519326720.

The previous prime is 71138602657. The next prime is 71138602789. The reversal of 71138602717 is 71720683117.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-71138602717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71138602217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4985409 + ... + 4999657.

It is an arithmetic number, because the mean of its divisors is an integer number (2773449000).

Almost surely, 2^71138602717 is an apocalyptic number.

It is an amenable number.

71138602717 is a deficient number, since it is larger than the sum of its proper divisors (17611765283).

71138602717 is a wasteful number, since it uses less digits than its factorization.

71138602717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15013.

The product of its (nonzero) digits is 98784, while the sum is 43.

The spelling of 71138602717 in words is "seventy-one billion, one hundred thirty-eight million, six hundred two thousand, seven hundred seventeen".