2878486561 has 2 divisors, whose sum is σ = 2878486562. Its totient is φ = 2878486560.

The previous prime is 2878486531. The next prime is 2878486573. The reversal of 2878486561 is 1656848782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1987822225 + 890664336 = 44585^2 + 29844^2 .

It is a cyclic number.

It is not a de Polignac number, because 2878486561 - 2⁹ = 2878486049 is a prime.

It is not a weakly prime, because it can be changed into another prime (2878486531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439243280 + 1439243281.

It is an arithmetic number, because the mean of its divisors is an integer number (1439243281).

Almost surely, 2^2878486561 is an apocalyptic number.

It is an amenable number.

2878486561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878486561 is an equidigital number, since it uses as much as digits as its factorization.

2878486561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5160960, while the sum is 55.

The square root of 2878486561 is about 53651.5289716891. The cubic root of 2878486561 is about 1422.5080586355.

It can be divided in two parts, 287 and 8486561, that added together give a palindrome (8486848).

The spelling of 2878486561 in words is "two billion, eight hundred seventy-eight million, four hundred eighty-six thousand, five hundred sixty-one".