581861045 has 8 divisors (see below), whose sum is σ = 698782680. Its totient is φ = 465122560.

The previous prime is 581861011. The next prime is 581861099. The reversal of 581861045 is 540168185.

It can be written as a sum of positive squares in 4 ways, for example, as 139263601 + 442597444 = 11801^2 + 21038^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 581861045 - 2¹⁰ = 581860021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38696 + ... + 51585.

It is an arithmetic number, because the mean of its divisors is an integer number (87347835).

Almost surely, 2^581861045 is an apocalyptic number.

It is an amenable number.

581861045 is a deficient number, since it is larger than the sum of its proper divisors (116921635).

581861045 is a wasteful number, since it uses less digits than its factorization.

581861045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91575.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 581861045 is about 24121.7960566787. The cubic root of 581861045 is about 834.8461093044.

The spelling of 581861045 in words is "five hundred eighty-one million, eight hundred sixty-one thousand, forty-five".