4391845489 has 2 divisors, whose sum is σ = 4391845490. Its totient is φ = 4391845488.

The previous prime is 4391845439. The next prime is 4391845541. The reversal of 4391845489 is 9845481934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2991214864 + 1400630625 = 54692^2 + 37425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4391845489 is a prime.

It is not a weakly prime, because it can be changed into another prime (4391845439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195922744 + 2195922745.

It is an arithmetic number, because the mean of its divisors is an integer number (2195922745).

Almost surely, 2^4391845489 is an apocalyptic number.

It is an amenable number.

4391845489 is a deficient number, since it is larger than the sum of its proper divisors (1).

4391845489 is an equidigital number, since it uses as much as digits as its factorization.

4391845489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 55.

The square root of 4391845489 is about 66271.0003621494. Note that the first 3 decimals coincide. The cubic root of 4391845489 is about 1637.6296175703.

The spelling of 4391845489 in words is "four billion, three hundred ninety-one million, eight hundred forty-five thousand, four hundred eighty-nine".