2565571712 has 120 divisors (see below), whose sum is σ = 5778232425. Its totient is φ = 1134650880.

The previous prime is 2565571709. The next prime is 2565571717. The reversal of 2565571712 is 2171755652.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 2069886016 + 495685696 = 45496^2 + 22264^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=35816.

It is a super-2 number, since 2×2565571712² = 13164316418829221888, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (147000) is a multiple of the sum of its prime divisors (50).

It is a self number, because there is not a number n which added to its sum of digits gives 2565571712.

It is not an unprimeable number, because it can be changed into a prime (2565571717) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 69339758 + ... + 69339794.

Almost surely, 2^2565571712 is an apocalyptic number.

2565571712 is a gapful number since it is divisible by the number (22) 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 2565571712

2565571712 is an abundant number, since it is smaller than the sum of its proper divisors (3212660713).

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

2565571712 is an frugal number, since it uses more digits than its factorization.

2565571712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 50 counting only the distinct ones).

The product of its digits is 147000, while the sum is 41.

The square root of 2565571712 is about 50651.4729499548. The cubic root of 2565571712 is about 1368.9724854465.

The spelling of 2565571712 in words is "two billion, five hundred sixty-five million, five hundred seventy-one thousand, seven hundred twelve".