5284128565 has 4 divisors (see below), whose sum is σ = 6340954284. Its totient is φ = 4227302848.

The previous prime is 5284128533. The next prime is 5284128569. The reversal of 5284128565 is 5658214825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2377732644 + 2906395921 = 48762^2 + 53911^2 .

It is a cyclic number.

It is not a de Polignac number, because 5284128565 - 2⁵ = 5284128533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5284128569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528412852 + ... + 528412861.

It is an arithmetic number, because the mean of its divisors is an integer number (1585238571).

Almost surely, 2^5284128565 is an apocalyptic number.

It is an amenable number.

5284128565 is a deficient number, since it is larger than the sum of its proper divisors (1056825719).

5284128565 is a wasteful number, since it uses less digits than its factorization.

5284128565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056825718.

The product of its digits is 768000, while the sum is 46.

The square root of 5284128565 is about 72692.0117000486. The cubic root of 5284128565 is about 1741.7712800065.

It can be divided in two parts, 52841 and 28565, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 5284128565 in words is "five billion, two hundred eighty-four million, one hundred twenty-eight thousand, five hundred sixty-five".