581162953081 has 4 divisors (see below), whose sum is σ = 581442226164. Its totient is φ = 580883680000.

The previous prime is 581162953057. The next prime is 581162953097. The reversal of 581162953081 is 180359261185.

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 104316080400 + 476846872681 = 322980^2 + 690541^2 .

It is a cyclic number.

It is not a de Polignac number, because 581162953081 - 2¹⁹ = 581162428793 is a prime.

It is a super-2 number, since 2×581162953081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (581162953381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139633420 + ... + 139637581.

It is an arithmetic number, because the mean of its divisors is an integer number (145360556541).

Almost surely, 2^581162953081 is an apocalyptic number.

It is an amenable number.

581162953081 is a deficient number, since it is larger than the sum of its proper divisors (279273083).

581162953081 is a wasteful number, since it uses less digits than its factorization.

581162953081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279273082.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 581162953081 in words is "five hundred eighty-one billion, one hundred sixty-two million, nine hundred fifty-three thousand, eighty-one".