6445071053 has 4 divisors (see below), whose sum is σ = 6445606140. Its totient is φ = 6444535968.

The previous prime is 6445071047. The next prime is 6445071077. The reversal of 6445071053 is 3501705446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3501705446 = 2 ⋅1750852723.

It can be written as a sum of positive squares in 2 ways, for example, as 2864604484 + 3580466569 = 53522^2 + 59837^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445071053 - 2³² = 2150103757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445071253) 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 in 3 ways as a sum of consecutive naturals, for example, 249050 + ... + 273707.

It is an arithmetic number, because the mean of its divisors is an integer number (1611401535).

Almost surely, 2^6445071053 is an apocalyptic number.

It is an amenable number.

6445071053 is a deficient number, since it is larger than the sum of its proper divisors (535087).

6445071053 is a wasteful number, since it uses less digits than its factorization.

6445071053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535086.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 6445071053 is about 80281.1998726975. The cubic root of 6445071053 is about 1860.9837025904.

Adding to 6445071053 its reverse (3501705446), we get a palindrome (9946776499).

The spelling of 6445071053 in words is "six billion, four hundred forty-five million, seventy-one thousand, fifty-three".