581441616 has 120 divisors (see below), whose sum is σ = 1969141824. Its totient is φ = 156349440.

The previous prime is 581441603. The next prime is 581441621. The reversal of 581441616 is 616144185.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171 + ... + 34101.

Almost surely, 2^581441616 is an apocalyptic number.

581441616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581441616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984570912).

581441616 is an abundant number, since it is smaller than the sum of its proper divisors (1387700208).

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

581441616 is a wasteful number, since it uses less digits than its factorization.

581441616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33969 (or 33960 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 581441616 is about 24113.1005057417. The cubic root of 581441616 is about 834.6454641265.

The spelling of 581441616 in words is "five hundred eighty-one million, four hundred forty-one thousand, six hundred sixteen".