581496228481 has 27 divisors (see below), whose sum is σ = 693596232777. Its totient is φ = 486085608960.

The previous prime is 581496228457. The next prime is 581496228539. The reversal of 581496228481 is 184822694185.

It is a happy number.

The square root of 581496228481 is 762559.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 92358249025 + 489137979456 = 303905^2 + 699384^2 .

It is not a de Polignac number, because 581496228481 - 2¹⁹ = 581495704193 is a prime.

It is a super-2 number, since 2×581496228481² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (581496223481) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 218853105 + ... + 218855761.

Almost surely, 2^581496228481 is an apocalyptic number.

581496228481 is the 762559-th square number.

581496228481 is the 381280-th centered octagonal number.

It is an amenable number.

581496228481 is a deficient number, since it is larger than the sum of its proper divisors (112100004296).

581496228481 is an frugal number, since it uses more digits than its factorization.

581496228481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410 (or 2705 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 58.

The spelling of 581496228481 in words is "five hundred eighty-one billion, four hundred ninety-six million, two hundred twenty-eight thousand, four hundred eighty-one".