71085728368 has 20 divisors (see below), whose sum is σ = 137859926400. Its totient is φ = 35508973184.

The previous prime is 71085728303. The next prime is 71085728419. The reversal of 71085728368 is 86382758017.

It is a happy number.

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, 2100880 + ... + 2134447.

It is an arithmetic number, because the mean of its divisors is an integer number (6892996320).

Almost surely, 2^71085728368 is an apocalyptic number.

It is an amenable number.

71085728368 is a deficient number, since it is larger than the sum of its proper divisors (66774198032).

71085728368 is a wasteful number, since it uses less digits than its factorization.

71085728368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236384 (or 4236378 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 71085728368 in words is "seventy-one billion, eighty-five million, seven hundred twenty-eight thousand, three hundred sixty-eight".