5409866565 has 96 divisors (see below), whose sum is σ = 10239911136. Its totient is φ = 2631352320.

The previous prime is 5409866537. The next prime is 5409866573. The reversal of 5409866565 is 5656689045.

5409866565 is a `hidden beast` number, since 540 + 98 + 6 + 6 + 5 + 6 + 5 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 131262849 + 5278603716 = 11457^2 + 72654^2 .

It is not a de Polignac number, because 5409866565 - 2¹⁹ = 5409342277 is a prime.

It is a super-2 number, since 2×5409866565² = 58533312502209798450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5425647 + ... + 5426643.

It is an arithmetic number, because the mean of its divisors is an integer number (106665741).

Almost surely, 2^5409866565 is an apocalyptic number.

It is an amenable number.

5409866565 is a deficient number, since it is larger than the sum of its proper divisors (4830044571).

5409866565 is a wasteful number, since it uses less digits than its factorization.

5409866565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The square root of 5409866565 is about 73551.7951174545. The cubic root of 5409866565 is about 1755.4785117377.

The spelling of 5409866565 in words is "five billion, four hundred nine million, eight hundred sixty-six thousand, five hundred sixty-five".