581685016 has 64 divisors (see below), whose sum is σ = 1238263200. Its totient is φ = 253747200.

The previous prime is 581685007. The next prime is 581685053. The reversal of 581685016 is 610586185.

581685016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 581685016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491946 + ... + 493126.

Almost surely, 2^581685016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581685016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619131600).

581685016 is an abundant number, since it is smaller than the sum of its proper divisors (656578184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

581685016 is a wasteful number, since it uses less digits than its factorization.

581685016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 581685016 is about 24118.1470266685. The cubic root of 581685016 is about 834.7619128289.

The spelling of 581685016 in words is "five hundred eighty-one million, six hundred eighty-five thousand, sixteen".