71220715684 has 12 divisors (see below), whose sum is σ = 124722159408. Its totient is φ = 35585813000.

The previous prime is 71220715679. The next prime is 71220715691. The reversal of 71220715684 is 48651702217.

It is a self number, because there is not a number n which added to its sum of digits gives 71220715684.

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, 6129682 + ... + 6141289.

It is an arithmetic number, because the mean of its divisors is an integer number (10393513284).

Almost surely, 2^71220715684 is an apocalyptic number.

It is an amenable number.

71220715684 is a deficient number, since it is larger than the sum of its proper divisors (53501443724).

71220715684 is a wasteful number, since it uses less digits than its factorization.

71220715684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12272426 (or 12272424 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 71220715684 in words is "seventy-one billion, two hundred twenty million, seven hundred fifteen thousand, six hundred eighty-four".