71688325091 has 4 divisors (see below), whose sum is σ = 71693811000. Its totient is φ = 71682839184.

The previous prime is 71688325069. The next prime is 71688325109. The reversal of 71688325091 is 19052388617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19052388617 = 113 ⋅168605209.

It is a cyclic number.

It is not a de Polignac number, because 71688325091 - 2¹⁰ = 71688324067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71688325021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2723306 + ... + 2749503.

It is an arithmetic number, because the mean of its divisors is an integer number (17923452750).

Almost surely, 2^71688325091 is an apocalyptic number.

71688325091 is a deficient number, since it is larger than the sum of its proper divisors (5485909).

71688325091 is a wasteful number, since it uses less digits than its factorization.

71688325091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485908.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 71688325091 in words is "seventy-one billion, six hundred eighty-eight million, three hundred twenty-five thousand, ninety-one".