2649880565 has 8 divisors (see below), whose sum is σ = 3231985848. Its totient is φ = 2085151680.

The previous prime is 2649880549. The next prime is 2649880601. The reversal of 2649880565 is 5650889462.

It can be written as a sum of positive squares in 4 ways, for example, as 22600516 + 2627280049 = 4754^2 + 51257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2649880565 - 2⁴ = 2649880549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4343762 + ... + 4344371.

It is an arithmetic number, because the mean of its divisors is an integer number (403998231).

Almost surely, 2^2649880565 is an apocalyptic number.

It is an amenable number.

2649880565 is a deficient number, since it is larger than the sum of its proper divisors (582105283).

2649880565 is an equidigital number, since it uses as much as digits as its factorization.

2649880565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8688199.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The square root of 2649880565 is about 51476.9906365941. The cubic root of 2649880565 is about 1383.8067137173.

The spelling of 2649880565 in words is "two billion, six hundred forty-nine million, eight hundred eighty thousand, five hundred sixty-five".