3565816849 has 24 divisors (see below), whose sum is σ = 4365394368. Its totient is φ = 2852197920.

The previous prime is 3565816847. The next prime is 3565816871. The reversal of 3565816849 is 9486185653.

It is not a de Polignac number, because 3565816849 - 2¹ = 3565816847 is a prime.

It is a super-2 number, since 2×3565816849² = 25430099601224577602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3565816849.

It is not an unprimeable number, because it can be changed into a prime (3565816841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158779 + ... + 179839.

It is an arithmetic number, because the mean of its divisors is an integer number (181891432).

Almost surely, 2^3565816849 is an apocalyptic number.

It is an amenable number.

3565816849 is a deficient number, since it is larger than the sum of its proper divisors (799577519).

3565816849 is a wasteful number, since it uses less digits than its factorization.

3565816849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21173 (or 21154 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 55.

The square root of 3565816849 is about 59714.4609705220. The cubic root of 3565816849 is about 1527.7525276113.

The spelling of 3565816849 in words is "three billion, five hundred sixty-five million, eight hundred sixteen thousand, eight hundred forty-nine".