4221563565912 has 192 divisors, whose sum is σ = 13394604009600. Its totient is φ = 1096385794560.

The previous prime is 4221563565893. The next prime is 4221563565983. The reversal of 4221563565912 is 2195653651224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188375764 + ... + 188398172.

It is an arithmetic number, because the mean of its divisors is an integer number (69763562550).

Almost surely, 2^{4221563565912} is an apocalyptic number.

4221563565912 is a gapful number since it is divisible by the number (42) 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 4221563565912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6697302004800).

4221563565912 is an abundant number, since it is smaller than the sum of its proper divisors (9173040443688).

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

4221563565912 is a wasteful number, since it uses less digits than its factorization.

4221563565912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37006 (or 36995 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 51.

The spelling of 4221563565912 in words is "four trillion, two hundred twenty-one billion, five hundred sixty-three million, five hundred sixty-five thousand, nine hundred twelve".