549999999541 has 2 divisors, whose sum is σ = 549999999542. Its totient is φ = 549999999540.

The previous prime is 549999999517. The next prime is 549999999629. The reversal of 549999999541 is 145999999945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549445632516 + 554367025 = 741246^2 + 23545^2 .

It is a cyclic number.

It is not a de Polignac number, because 549999999541 - 2¹⁷ = 549999868469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549999999041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274999999770 + 274999999771.

It is an arithmetic number, because the mean of its divisors is an integer number (274999999771).

Almost surely, 2^549999999541 is an apocalyptic number.

It is an amenable number.

549999999541 is a deficient number, since it is larger than the sum of its proper divisors (1).

549999999541 is an equidigital number, since it uses as much as digits as its factorization.

549999999541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1913187600, while the sum is 82.

The spelling of 549999999541 in words is "five hundred forty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred forty-one".