71986147616 has 12 divisors (see below), whose sum is σ = 141722728182. Its totient is φ = 35993073792.

The previous prime is 71986147561. The next prime is 71986147619. The reversal of 71986147616 is 61674168917.

It can be written as a sum of positive squares in only one way, i.e., 66801571600 + 5184576016 = 258460^2 + 72004^2 .

It is not an unprimeable number, because it can be changed into a prime (71986147619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1124783525 + ... + 1124783588.

Almost surely, 2^71986147616 is an apocalyptic number.

It is an amenable number.

71986147616 is a deficient number, since it is larger than the sum of its proper divisors (69736580566).

71986147616 is a wasteful number, since it uses less digits than its factorization.

71986147616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249567123 (or 2249567115 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The spelling of 71986147616 in words is "seventy-one billion, nine hundred eighty-six million, one hundred forty-seven thousand, six hundred sixteen".