71988619081 has 8 divisors (see below), whose sum is σ = 72143797824. Its totient is φ = 71833489200.

The previous prime is 71988619069. The next prime is 71988619127. The reversal of 71988619081 is 18091688917.

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

It is a cyclic number.

It is not a de Polignac number, because 71988619081 - 2⁵ = 71988619049 is a prime.

It is a super-3 number, since 3×71988619081³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71988616081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5942931 + ... + 5955031.

It is an arithmetic number, because the mean of its divisors is an integer number (9017974728).

Almost surely, 2^71988619081 is an apocalyptic number.

It is an amenable number.

71988619081 is a deficient number, since it is larger than the sum of its proper divisors (155178743).

71988619081 is a wasteful number, since it uses less digits than its factorization.

71988619081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24431.

The product of its (nonzero) digits is 1741824, while the sum is 58.

The spelling of 71988619081 in words is "seventy-one billion, nine hundred eighty-eight million, six hundred nineteen thousand, eighty-one".