5645381249 has 2 divisors, whose sum is σ = 5645381250. Its totient is φ = 5645381248.

The previous prime is 5645381243. The next prime is 5645381293. The reversal of 5645381249 is 9421835465.

5645381249 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3197110849 + 2448270400 = 56543^2 + 49480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5645381249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5645381243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822690624 + 2822690625.

It is an arithmetic number, because the mean of its divisors is an integer number (2822690625).

Almost surely, 2^5645381249 is an apocalyptic number.

It is an amenable number.

5645381249 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645381249 is an equidigital number, since it uses as much as digits as its factorization.

5645381249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 47.

The square root of 5645381249 is about 75135.7521357177. The cubic root of 5645381249 is about 1780.5920314266.

The spelling of 5645381249 in words is "five billion, six hundred forty-five million, three hundred eighty-one thousand, two hundred forty-nine".