2481878561 has 2 divisors, whose sum is σ = 2481878562. Its totient is φ = 2481878560.

The previous prime is 2481878557. The next prime is 2481878573. The reversal of 2481878561 is 1658781842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2063430625 + 418447936 = 45425^2 + 20456^2 .

It is a cyclic number.

It is not a de Polignac number, because 2481878561 - 2² = 2481878557 is a prime.

It is not a weakly prime, because it can be changed into another prime (2481874561) 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 as a sum of consecutive naturals, namely, 1240939280 + 1240939281.

It is an arithmetic number, because the mean of its divisors is an integer number (1240939281).

Almost surely, 2^2481878561 is an apocalyptic number.

It is an amenable number.

2481878561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2481878561 is an equidigital number, since it uses as much as digits as its factorization.

2481878561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 50.

The square root of 2481878561 is about 49818.4560278618. The cubic root of 2481878561 is about 1353.9215759891.

The spelling of 2481878561 in words is "two billion, four hundred eighty-one million, eight hundred seventy-eight thousand, five hundred sixty-one".