544009499981 has 2 divisors, whose sum is σ = 544009499982. Its totient is φ = 544009499980.

The previous prime is 544009499953. The next prime is 544009500007. The reversal of 544009499981 is 189994900445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458125922500 + 85883577481 = 676850^2 + 293059^2 .

It is a cyclic number.

It is not a de Polignac number, because 544009499981 - 2³⁸ = 269131593037 is a prime.

It is a super-2 number, since 2×544009499981² (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 (544009499921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272004749990 + 272004749991.

It is an arithmetic number, because the mean of its divisors is an integer number (272004749991).

Almost surely, 2^544009499981 is an apocalyptic number.

It is an amenable number.

544009499981 is a deficient number, since it is larger than the sum of its proper divisors (1).

544009499981 is an equidigital number, since it uses as much as digits as its factorization.

544009499981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 62.

The spelling of 544009499981 in words is "five hundred forty-four billion, nine million, four hundred ninety-nine thousand, nine hundred eighty-one".