544189145821 has 2 divisors, whose sum is σ = 544189145822. Its totient is φ = 544189145820.

The previous prime is 544189145807. The next prime is 544189145873. The reversal of 544189145821 is 128541981445.

It is an a-pointer prime, because the next prime (544189145873) can be obtained adding 544189145821 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274983823321 + 269205322500 = 524389^2 + 518850^2 .

It is a cyclic number.

It is not a de Polignac number, because 544189145821 - 2²⁹ = 543652274909 is a prime.

It is a super-2 number, since 2×544189145821² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544189145891) 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, 272094572910 + 272094572911.

It is an arithmetic number, because the mean of its divisors is an integer number (272094572911).

Almost surely, 2^544189145821 is an apocalyptic number.

It is an amenable number.

544189145821 is a deficient number, since it is larger than the sum of its proper divisors (1).

544189145821 is an equidigital number, since it uses as much as digits as its factorization.

544189145821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843200, while the sum is 52.

The spelling of 544189145821 in words is "five hundred forty-four billion, one hundred eighty-nine million, one hundred forty-five thousand, eight hundred twenty-one".