71972588799556 has 9 divisors (see below), whose sum is σ = 125952060092061. Its totient is φ = 35986285916112.

The previous prime is 71972588799499. The next prime is 71972588799667. The reversal of 71972588799556 is 65599788527917.

The square root of 71972588799556 is 8483666.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16731781202500 + 55240807597056 = 4090450^2 + 7432416^2 .

It is a super-2 number, since 2×71972588799556² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14846416 + ... + 19088248.

Almost surely, 2^{71972588799556} is an apocalyptic number.

71972588799556 is the 8483666-th square number.

It is an amenable number.

71972588799556 is a deficient number, since it is larger than the sum of its proper divisors (53979471292505).

71972588799556 is an frugal number, since it uses more digits than its factorization.

71972588799556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483670 (or 4241835 counting only the distinct ones).

The product of its digits is 24004512000, while the sum is 88.

The spelling of 71972588799556 in words is "seventy-one trillion, nine hundred seventy-two billion, five hundred eighty-eight million, seven hundred ninety-nine thousand, five hundred fifty-six".