581113486864 has 15 divisors (see below), whose sum is σ = 1125913288717. Its totient is φ = 290555218816.

The previous prime is 581113486853. The next prime is 581113486867. The reversal of 581113486864 is 468684311185.

The square root of 581113486864 is 762308.

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

It can be written as a sum of positive squares in only one way, i.e., 88601475600 + 492512011264 = 297660^2 + 701792^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (581113486867) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2953944 + ... + 3144520.

Almost surely, 2^581113486864 is an apocalyptic number.

581113486864 is the 762308-th square number.

It is an amenable number.

581113486864 is a deficient number, since it is larger than the sum of its proper divisors (544799801853).

581113486864 is an frugal number, since it uses more digits than its factorization.

581113486864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381162 (or 190579 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 55.

The spelling of 581113486864 in words is "five hundred eighty-one billion, one hundred thirteen million, four hundred eighty-six thousand, eight hundred sixty-four".