71183984721 has 8 divisors (see below), whose sum is σ = 94917975264. Its totient is φ = 47452992000.

The previous prime is 71183984713. The next prime is 71183984737. The reversal of 71183984721 is 12748938117.

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

It is not a de Polignac number, because 71183984721 - 2³ = 71183984713 is a prime.

It is a super-3 number, since 3×71183984721³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (71183984741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693451 + ... + 789456.

It is an arithmetic number, because the mean of its divisors is an integer number (11864746908).

Almost surely, 2^71183984721 is an apocalyptic number.

It is an amenable number.

71183984721 is a deficient number, since it is larger than the sum of its proper divisors (23733990543).

71183984721 is a wasteful number, since it uses less digits than its factorization.

71183984721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498911.

The product of its digits is 677376, while the sum is 51.

The spelling of 71183984721 in words is "seventy-one billion, one hundred eighty-three million, nine hundred eighty-four thousand, seven hundred twenty-one".