581639459441616 has 60 divisors (see below), whose sum is σ = 1633016681805600. Its totient is φ = 193256412018240.

The previous prime is 581639459441567. The next prime is 581639459441629. The reversal of 581639459441616 is 616144954936185.

581639459441616 is a `hidden beast` number, since 5 + 8 + 1 + 6 + 3 + 9 + 4 + 594 + 4 + 16 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6493786266 + ... + 6493875833.

It is an arithmetic number, because the mean of its divisors is an integer number (27216944696760).

Almost surely, 2^{581639459441616} is an apocalyptic number.

It is an amenable number.

581639459441616 is an abundant number, since it is smaller than the sum of its proper divisors (1051377222363984).

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

581639459441616 is a wasteful number, since it uses less digits than its factorization.

581639459441616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987662424 (or 12987662415 counting only the distinct ones).

The product of its digits is 671846400, while the sum is 72.

The spelling of 581639459441616 in words is "five hundred eighty-one trillion, six hundred thirty-nine billion, four hundred fifty-nine million, four hundred forty-one thousand, six hundred sixteen".