71311788719 has 4 divisors (see below), whose sum is σ = 74412301296. Its totient is φ = 68211276144.

The previous prime is 71311788659. The next prime is 71311788727. The reversal of 71311788719 is 91788711317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91788711317 = 15377 ⋅5969221.

It is a cyclic number.

It is not a de Polignac number, because 71311788719 - 2²⁰ = 71310740143 is a prime.

It is a super-2 number, since 2×71311788719² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71311788749) 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, 1550256254 + ... + 1550256299.

It is an arithmetic number, because the mean of its divisors is an integer number (18603075324).

Almost surely, 2^71311788719 is an apocalyptic number.

71311788719 is a deficient number, since it is larger than the sum of its proper divisors (3100512577).

71311788719 is a wasteful number, since it uses less digits than its factorization.

71311788719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100512576.

The product of its digits is 592704, while the sum is 53.

The spelling of 71311788719 in words is "seventy-one billion, three hundred eleven million, seven hundred eighty-eight thousand, seven hundred nineteen".