71243649793 has 16 divisors (see below), whose sum is σ = 78947930880. Its totient is φ = 63947068416.

The previous prime is 71243649779. The next prime is 71243649797. The reversal of 71243649793 is 39794634217.

It is a cyclic number.

It is not a de Polignac number, because 71243649793 - 2²⁵ = 71210095361 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 138573 + ... + 402106.

It is an arithmetic number, because the mean of its divisors is an integer number (4934245680).

Almost surely, 2^71243649793 is an apocalyptic number.

It is an amenable number.

71243649793 is a deficient number, since it is larger than the sum of its proper divisors (7704281087).

71243649793 is a wasteful number, since it uses less digits than its factorization.

71243649793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541056.

The product of its digits is 6858432, while the sum is 55.

The spelling of 71243649793 in words is "seventy-one billion, two hundred forty-three million, six hundred forty-nine thousand, seven hundred ninety-three".