71865662736 has 80 divisors (see below), whose sum is σ = 221399829504. Its totient is φ = 19640303232.

The previous prime is 71865662711. The next prime is 71865662747. The reversal of 71865662736 is 63726656817.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4641966 + ... + 4657421.

Almost surely, 2^71865662736 is an apocalyptic number.

It is an amenable number.

71865662736 is an abundant number, since it is smaller than the sum of its proper divisors (149534166768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71865662736 is a wasteful number, since it uses less digits than its factorization.

71865662736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9299428 (or 9299422 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 57.

The spelling of 71865662736 in words is "seventy-one billion, eight hundred sixty-five million, six hundred sixty-two thousand, seven hundred thirty-six".