71366912789 has 4 divisors (see below), whose sum is σ = 71592045324. Its totient is φ = 71141780256.

The previous prime is 71366912759. The next prime is 71366912803. The reversal of 71366912789 is 98721966317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1784386564 + 69582526225 = 42242^2 + 263785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71366912789 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 (71366912759) 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, 112565792 + ... + 112566425.

It is an arithmetic number, because the mean of its divisors is an integer number (17898011331).

Almost surely, 2^71366912789 is an apocalyptic number.

It is an amenable number.

71366912789 is a deficient number, since it is larger than the sum of its proper divisors (225132535).

71366912789 is a wasteful number, since it uses less digits than its factorization.

71366912789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225132534.

The product of its digits is 6858432, while the sum is 59.

The spelling of 71366912789 in words is "seventy-one billion, three hundred sixty-six million, nine hundred twelve thousand, seven hundred eighty-nine".