2849817665 has 4 divisors (see below), whose sum is σ = 3419781204. Its totient is φ = 2279854128.

The previous prime is 2849817629. The next prime is 2849817679. The reversal of 2849817665 is 5667189482.

It is a happy number.

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 1090518529 + 1759299136 = 33023^2 + 41944^2 .

It is a cyclic number.

It is not a de Polignac number, because 2849817665 - 2¹² = 2849813569 is a prime.

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 2849817665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284981762 + ... + 284981771.

It is an arithmetic number, because the mean of its divisors is an integer number (854945301).

Almost surely, 2^2849817665 is an apocalyptic number.

It is an amenable number.

2849817665 is a deficient number, since it is larger than the sum of its proper divisors (569963539).

2849817665 is an equidigital number, since it uses as much as digits as its factorization.

2849817665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569963538.

The product of its digits is 5806080, while the sum is 56.

The square root of 2849817665 is about 53383.6835091023. The cubic root of 2849817665 is about 1417.7697027528.

The spelling of 2849817665 in words is "two billion, eight hundred forty-nine million, eight hundred seventeen thousand, six hundred sixty-five".