4400878561 has 2 divisors, whose sum is σ = 4400878562. Its totient is φ = 4400878560.

The previous prime is 4400878543. The next prime is 4400878579. The reversal of 4400878561 is 1658780044.

It is a balanced prime because it is at equal distance from previous prime (4400878543) and next prime (4400878579).

It can be written as a sum of positive squares in only one way, i.e., 3679150336 + 721728225 = 60656^2 + 26865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4400878561 is a prime.

It is not a weakly prime, because it can be changed into another prime (4400878501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2200439280 + 2200439281.

It is an arithmetic number, because the mean of its divisors is an integer number (2200439281).

Almost surely, 2^4400878561 is an apocalyptic number.

It is an amenable number.

4400878561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4400878561 is an equidigital number, since it uses as much as digits as its factorization.

4400878561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 4400878561 is about 66339.1178792724. The cubic root of 4400878561 is about 1638.7515981423.

The spelling of 4400878561 in words is "four billion, four hundred million, eight hundred seventy-eight thousand, five hundred sixty-one".