581112421616 has 20 divisors (see below), whose sum is σ = 1126536838992. Its totient is φ = 290393237376.

The previous prime is 581112421573. The next prime is 581112421627. The reversal of 581112421616 is 616124211185.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 581112421616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10156421 + ... + 10213476.

Almost surely, 2^581112421616 is an apocalyptic number.

It is an amenable number.

581112421616 is a deficient number, since it is larger than the sum of its proper divisors (545424417376).

581112421616 is a wasteful number, since it uses less digits than its factorization.

581112421616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20371688 (or 20371682 counting only the distinct ones).

The product of its digits is 23040, while the sum is 38.

The spelling of 581112421616 in words is "five hundred eighty-one billion, one hundred twelve million, four hundred twenty-one thousand, six hundred sixteen".