4320561649 has 2 divisors, whose sum is σ = 4320561650. Its totient is φ = 4320561648.

The previous prime is 4320561613. The next prime is 4320561689. The reversal of 4320561649 is 9461650234.

It is an a-pointer prime, because the next prime (4320561689) can be obtained adding 4320561649 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4295491600 + 25070049 = 65540^2 + 5007^2 .

It is a cyclic number.

It is not a de Polignac number, because 4320561649 - 2¹⁹ = 4320037361 is a prime.

It is not a weakly prime, because it can be changed into another prime (4320561689) 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, 2160280824 + 2160280825.

It is an arithmetic number, because the mean of its divisors is an integer number (2160280825).

Almost surely, 2^4320561649 is an apocalyptic number.

It is an amenable number.

4320561649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4320561649 is an equidigital number, since it uses as much as digits as its factorization.

4320561649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 4320561649 is about 65730.9793704612. The cubic root of 4320561649 is about 1628.7211479141.

The spelling of 4320561649 in words is "four billion, three hundred twenty million, five hundred sixty-one thousand, six hundred forty-nine".