581741718811 has 4 divisors (see below), whose sum is σ = 634627329624. Its totient is φ = 528856108000.

The previous prime is 581741718737. The next prime is 581741718913. The reversal of 581741718811 is 118817147185.

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

It is a de Polignac number, because none of the positive numbers 2^k-581741718811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (581741718011) 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, 26442805390 + ... + 26442805411.

It is an arithmetic number, because the mean of its divisors is an integer number (158656832406).

Almost surely, 2^581741718811 is an apocalyptic number.

581741718811 is a deficient number, since it is larger than the sum of its proper divisors (52885610813).

581741718811 is a wasteful number, since it uses less digits than its factorization.

581741718811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52885610812.

The product of its digits is 501760, while the sum is 52.

The spelling of 581741718811 in words is "five hundred eighty-one billion, seven hundred forty-one million, seven hundred eighteen thousand, eight hundred eleven".