2808245561 has 6 divisors (see below), whose sum is σ = 3086749386. Its totient is φ = 2552950400.

The previous prime is 2808245551. The next prime is 2808245567. The reversal of 2808245561 is 1655428082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2783195536 + 25050025 = 52756^2 + 5005^2 .

It is not a de Polignac number, because 2808245561 - 2⁶ = 2808245497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2808245567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11604200 + ... + 11604441.

It is an arithmetic number, because the mean of its divisors is an integer number (514458231).

Almost surely, 2^2808245561 is an apocalyptic number.

It is an amenable number.

2808245561 is a deficient number, since it is larger than the sum of its proper divisors (278503825).

2808245561 is a wasteful number, since it uses less digits than its factorization.

2808245561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23208663 (or 23208652 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 2808245561 is about 52992.8821729862. The cubic root of 2808245561 is about 1410.8419365119.

The spelling of 2808245561 in words is "two billion, eight hundred eight million, two hundred forty-five thousand, five hundred sixty-one".