71608087013 has 4 divisors (see below), whose sum is σ = 71608761708. Its totient is φ = 71607412320.

The previous prime is 71608087003. The next prime is 71608087037. The reversal of 71608087013 is 31078080617.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31078080617 = 102481 ⋅303257.

It can be written as a sum of positive squares in 2 ways, for example, as 29125518244 + 42482568769 = 170662^2 + 206113^2 .

It is a cyclic number.

It is not a de Polignac number, because 71608087013 - 2⁸ = 71608086757 is a prime.

It is a super-3 number, since 3×71608087013³ (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 a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71608087003) 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 3 ways as a sum of consecutive naturals, for example, 139448 + ... + 403313.

It is an arithmetic number, because the mean of its divisors is an integer number (17902190427).

Almost surely, 2^71608087013 is an apocalyptic number.

It is an amenable number.

71608087013 is a deficient number, since it is larger than the sum of its proper divisors (674695).

71608087013 is a wasteful number, since it uses less digits than its factorization.

71608087013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674694.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 71608087013 in words is "seventy-one billion, six hundred eight million, eighty-seven thousand, thirteen".