581108461 has 4 divisors (see below), whose sum is σ = 581509852. Its totient is φ = 580707072.

The previous prime is 581108459. The next prime is 581108471. The reversal of 581108461 is 164801185.

It is a happy number.

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 432390436 + 148718025 = 20794^2 + 12195^2 .

It is a cyclic number.

It is not a de Polignac number, because 581108461 - 2¹ = 581108459 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 (581108401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198516 + ... + 201421.

It is an arithmetic number, because the mean of its divisors is an integer number (145377463).

Almost surely, 2^581108461 is an apocalyptic number.

It is an amenable number.

581108461 is a deficient number, since it is larger than the sum of its proper divisors (401391).

581108461 is a wasteful number, since it uses less digits than its factorization.

581108461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401390.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 581108461 is about 24106.1913416450. The cubic root of 581108461 is about 834.4860216719.

The spelling of 581108461 in words is "five hundred eighty-one million, one hundred eight thousand, four hundred sixty-one".