581681328764 has 12 divisors (see below), whose sum is σ = 1017953139000. Its totient is φ = 290837574768.

The previous prime is 581681328731. The next prime is 581681328769. The reversal of 581681328764 is 467823186185.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581681328769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319259 + ... + 1124850.

It is an arithmetic number, because the mean of its divisors is an integer number (84829428250).

Almost surely, 2^581681328764 is an apocalyptic number.

It is an amenable number.

581681328764 is a deficient number, since it is larger than the sum of its proper divisors (436271810236).

581681328764 is a wasteful number, since it uses less digits than its factorization.

581681328764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544812 (or 1544810 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 59.

The spelling of 581681328764 in words is "five hundred eighty-one billion, six hundred eighty-one million, three hundred twenty-eight thousand, seven hundred sixty-four".