53544332321 has 2 divisors, whose sum is σ = 53544332322. Its totient is φ = 53544332320.

The previous prime is 53544332299. The next prime is 53544332393. The reversal of 53544332321 is 12323344535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34765467025 + 18778865296 = 186455^2 + 137036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53544332321 is a prime.

It is not a weakly prime, because it can be changed into another prime (53544302321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26772166160 + 26772166161.

It is an arithmetic number, because the mean of its divisors is an integer number (26772166161).

Almost surely, 2^53544332321 is an apocalyptic number.

It is an amenable number.

53544332321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53544332321 is an equidigital number, since it uses as much as digits as its factorization.

53544332321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 35.

Adding to 53544332321 its reverse (12323344535), we get a palindrome (65867676856).

The spelling of 53544332321 in words is "fifty-three billion, five hundred forty-four million, three hundred thirty-two thousand, three hundred twenty-one".