71039068391 has 8 divisors (see below), whose sum is σ = 71115615360. Its totient is φ = 70962562048.

The previous prime is 71039068343. The next prime is 71039068409. The reversal of 71039068391 is 19386093017.

It is a happy number.

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 71039068391 - 2²² = 71034874087 is a prime.

It is a super-2 number, since 2×71039068391² (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 (71039068301) 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, 4506275 + ... + 4522011.

It is an arithmetic number, because the mean of its divisors is an integer number (8889451920).

Almost surely, 2^71039068391 is an apocalyptic number.

71039068391 is a deficient number, since it is larger than the sum of its proper divisors (76546969).

71039068391 is a wasteful number, since it uses less digits than its factorization.

71039068391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20313.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 71039068391 in words is "seventy-one billion, thirty-nine million, sixty-eight thousand, three hundred ninety-one".