581767487161 has 16 divisors (see below), whose sum is σ = 666781058944. Its totient is φ = 497230389504.

The previous prime is 581767487159. The next prime is 581767487183. The reversal of 581767487161 is 161784767185.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 581767487161 - 2¹ = 581767487159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 581767487161.

It is not an unprimeable number, because it can be changed into a prime (581767487111) 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, 17077201 + ... + 17111233.

It is an arithmetic number, because the mean of its divisors is an integer number (41673816184).

Almost surely, 2^581767487161 is an apocalyptic number.

It is an amenable number.

581767487161 is a deficient number, since it is larger than the sum of its proper divisors (85013571783).

581767487161 is a wasteful number, since it uses less digits than its factorization.

581767487161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40960.

The product of its digits is 15805440, while the sum is 61.

The spelling of 581767487161 in words is "five hundred eighty-one billion, seven hundred sixty-seven million, four hundred eighty-seven thousand, one hundred sixty-one".