545331444521 has 2 divisors, whose sum is σ = 545331444522. Its totient is φ = 545331444520.

The previous prime is 545331444517. The next prime is 545331444527. The reversal of 545331444521 is 125444133545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537671694121 + 7659750400 = 733261^2 + 87520^2 .

It is a cyclic number.

It is not a de Polignac number, because 545331444521 - 2² = 545331444517 is a prime.

It is not a weakly prime, because it can be changed into another prime (545331444527) 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, 272665722260 + 272665722261.

It is an arithmetic number, because the mean of its divisors is an integer number (272665722261).

Almost surely, 2^545331444521 is an apocalyptic number.

It is an amenable number.

545331444521 is a deficient number, since it is larger than the sum of its proper divisors (1).

545331444521 is an equidigital number, since it uses as much as digits as its factorization.

545331444521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576000, while the sum is 41.

The spelling of 545331444521 in words is "five hundred forty-five billion, three hundred thirty-one million, four hundred forty-four thousand, five hundred twenty-one".