544563199981 has 2 divisors, whose sum is σ = 544563199982. Its totient is φ = 544563199980.

The previous prime is 544563199967. The next prime is 544563200047. The reversal of 544563199981 is 189991365445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294913077481 + 249650122500 = 543059^2 + 499650^2 .

It is a cyclic number.

It is not a de Polignac number, because 544563199981 - 2²⁹ = 544026329069 is a prime.

It is a super-2 number, since 2×544563199981² (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 (544563190981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272281599990 + 272281599991.

It is an arithmetic number, because the mean of its divisors is an integer number (272281599991).

Almost surely, 2^544563199981 is an apocalyptic number.

It is an amenable number.

544563199981 is a deficient number, since it is larger than the sum of its proper divisors (1).

544563199981 is an equidigital number, since it uses as much as digits as its factorization.

544563199981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41990400, while the sum is 64.

The spelling of 544563199981 in words is "five hundred forty-four billion, five hundred sixty-three million, one hundred ninety-nine thousand, nine hundred eighty-one".