71996931686 has 8 divisors (see below), whose sum is σ = 113679365880. Its totient is φ = 34103809728.

The previous prime is 71996931631. The next prime is 71996931719. The reversal of 71996931686 is 68613969917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947328011 + ... + 947328086.

It is an arithmetic number, because the mean of its divisors is an integer number (14209920735).

Almost surely, 2^71996931686 is an apocalyptic number.

71996931686 is a deficient number, since it is larger than the sum of its proper divisors (41682434194).

71996931686 is a wasteful number, since it uses less digits than its factorization.

71996931686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894656118.

The product of its digits is 26453952, while the sum is 65.

The spelling of 71996931686 in words is "seventy-one billion, nine hundred ninety-six million, nine hundred thirty-one thousand, six hundred eighty-six".