71243649791 has 8 divisors (see below), whose sum is σ = 73776258000. Its totient is φ = 68716103680.

The previous prime is 71243649779. The next prime is 71243649797. The reversal of 71243649791 is 19794634217.

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 71243649791 - 2¹⁸ = 71243387647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71243649797) 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, 1236866 + ... + 1293183.

It is an arithmetic number, because the mean of its divisors is an integer number (9222032250).

Almost surely, 2^71243649791 is an apocalyptic number.

71243649791 is a deficient number, since it is larger than the sum of its proper divisors (2532608209).

71243649791 is a wasteful number, since it uses less digits than its factorization.

71243649791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531049.

The product of its digits is 2286144, while the sum is 53.

The spelling of 71243649791 in words is "seventy-one billion, two hundred forty-three million, six hundred forty-nine thousand, seven hundred ninety-one".