71189839391 has 8 divisors (see below), whose sum is σ = 77665155024. Its totient is φ = 64715109120.

The previous prime is 71189839379. The next prime is 71189839411. The reversal of 71189839391 is 19393898117.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71189839391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71189839391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71189839291) 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, 130781 + ... + 399353.

It is an arithmetic number, because the mean of its divisors is an integer number (9708144378).

Almost surely, 2^71189839391 is an apocalyptic number.

71189839391 is a deficient number, since it is larger than the sum of its proper divisors (6475315633).

71189839391 is a wasteful number, since it uses less digits than its factorization.

71189839391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292681.

The product of its digits is 2939328, while the sum is 59.

The spelling of 71189839391 in words is "seventy-one billion, one hundred eighty-nine million, eight hundred thirty-nine thousand, three hundred ninety-one".