54441965336821 has 2 divisors, whose sum is σ = 54441965336822. Its totient is φ = 54441965336820.

The previous prime is 54441965336797. The next prime is 54441965336849. The reversal of 54441965336821 is 12863356914445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54080507063025 + 361458273796 = 7353945^2 + 601214^2 .

It is a cyclic number.

It is not a de Polignac number, because 54441965336821 - 2³⁹ = 53892209522933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54441965336821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54441965336881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27220982668410 + 27220982668411.

It is an arithmetic number, because the mean of its divisors is an integer number (27220982668411).

Almost surely, 2^{54441965336821} is an apocalyptic number.

It is an amenable number.

54441965336821 is a deficient number, since it is larger than the sum of its proper divisors (1).

54441965336821 is an equidigital number, since it uses as much as digits as its factorization.

54441965336821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74649600, while the sum is 61.

The spelling of 54441965336821 in words is "fifty-four trillion, four hundred forty-one billion, nine hundred sixty-five million, three hundred thirty-six thousand, eight hundred twenty-one".