581480656 has 20 divisors (see below), whose sum is σ = 1131115104. Its totient is φ = 289580000.

The previous prime is 581480651. The next prime is 581480741. The reversal of 581480656 is 656084185.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581480651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68380 + ... + 76411.

Almost surely, 2^581480656 is an apocalyptic number.

It is an amenable number.

581480656 is a deficient number, since it is larger than the sum of its proper divisors (549634448).

581480656 is a wasteful number, since it uses less digits than its factorization.

581480656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145050 (or 145044 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 581480656 is about 24113.9100106142. The cubic root of 581480656 is about 834.6641440357.

The spelling of 581480656 in words is "five hundred eighty-one million, four hundred eighty thousand, six hundred fifty-six".