1565285568 has 224 divisors, whose sum is σ = 5196718080. Its totient is φ = 403952640.

The previous prime is 1565285521. The next prime is 1565285581. The reversal of 1565285568 is 8655825651.

It is a tau number, because it is divible by the number of its divisors (224).

It is a self number, because there is not a number n which added to its sum of digits gives 1565285568.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3533155 + ... + 3533597.

Almost surely, 2^1565285568 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 1565285568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2598359040).

1565285568 is an abundant number, since it is smaller than the sum of its proper divisors (3631432512).

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

1565285568 is a wasteful number, since it uses less digits than its factorization.

1565285568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 705 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 51.

The square root of 1565285568 is about 39563.6900200171. The cubic root of 1565285568 is about 1161.0863702984.

The spelling of 1565285568 in words is "one billion, five hundred sixty-five million, two hundred eighty-five thousand, five hundred sixty-eight".