3561988849 has 2 divisors, whose sum is σ = 3561988850. Its totient is φ = 3561988848.

The previous prime is 3561988823. The next prime is 3561988889. The reversal of 3561988849 is 9488891653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3325598224 + 236390625 = 57668^2 + 15375^2 .

It is a cyclic number.

It is not a de Polignac number, because 3561988849 - 2⁹ = 3561988337 is a prime.

It is not a weakly prime, because it can be changed into another prime (3561988819) 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, 1780994424 + 1780994425.

It is an arithmetic number, because the mean of its divisors is an integer number (1780994425).

Almost surely, 2^3561988849 is an apocalyptic number.

It is an amenable number.

3561988849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561988849 is an equidigital number, since it uses as much as digits as its factorization.

3561988849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 61.

The square root of 3561988849 is about 59682.3998260794. The cubic root of 3561988849 is about 1527.2056374298.

The spelling of 3561988849 in words is "three billion, five hundred sixty-one million, nine hundred eighty-eight thousand, eight hundred forty-nine".