53544544544521 has 2 divisors, whose sum is σ = 53544544544522. Its totient is φ = 53544544544520.

The previous prime is 53544544544509. The next prime is 53544544544551. The reversal of 53544544544521 is 12544544544535.

53544544544521 is digitally balanced in base 2, 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., 40365183289600 + 13179361254921 = 6353360^2 + 3630339^2 .

It is a cyclic number.

It is not a de Polignac number, because 53544544544521 - 2⁵ = 53544544544489 is a prime.

It is a super-2 number, since 2×53544544544521² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53544544544551) 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 as a sum of consecutive naturals, namely, 26772272272260 + 26772272272261.

It is an arithmetic number, because the mean of its divisors is an integer number (26772272272261).

Almost surely, 2^{53544544544521} is an apocalyptic number.

It is an amenable number.

53544544544521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53544544544521 is an equidigital number, since it uses as much as digits as its factorization.

53544544544521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800000, while the sum is 55.

The spelling of 53544544544521 in words is "fifty-three trillion, five hundred forty-four billion, five hundred forty-four million, five hundred forty-four thousand, five hundred twenty-one".