6440052533 has 6 divisors (see below), whose sum is σ = 6669781794. Its totient is φ = 6217980944.

The previous prime is 6440052497. The next prime is 6440052569. The reversal of 6440052533 is 3352500446.

It is an interprime number because it is at equal distance from previous prime (6440052497) and next prime (6440052569).

It can be written as a sum of positive squares in 3 ways, for example, as 1058656369 + 5381396164 = 32537^2 + 73358^2 .

It is not a de Polignac number, because 6440052533 - 2⁶ = 6440052469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6440052533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440052133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3827966 + ... + 3829647.

It is an arithmetic number, because the mean of its divisors is an integer number (1111630299).

Almost surely, 2^6440052533 is an apocalyptic number.

It is an amenable number.

6440052533 is a deficient number, since it is larger than the sum of its proper divisors (229729261).

6440052533 is an equidigital number, since it uses as much as digits as its factorization.

6440052533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7657671 (or 7657642 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 6440052533 is about 80249.9379002875. The cubic root of 6440052533 is about 1860.5005525484.

Adding to 6440052533 its reverse (3352500446), we get a palindrome (9792552979).

The spelling of 6440052533 in words is "six billion, four hundred forty million, fifty-two thousand, five hundred thirty-three".