549111689101 has 2 divisors, whose sum is σ = 549111689102. Its totient is φ = 549111689100.

The previous prime is 549111689011. The next prime is 549111689201. The reversal of 549111689101 is 101986111945.

Together with previous prime (549111689011) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302203072900 + 246908616201 = 549730^2 + 496899^2 .

It is a cyclic number.

It is not a de Polignac number, because 549111689101 - 2¹⁵ = 549111656333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549111689201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274555844550 + 274555844551.

It is an arithmetic number, because the mean of its divisors is an integer number (274555844551).

Almost surely, 2^549111689101 is an apocalyptic number.

It is an amenable number.

549111689101 is a deficient number, since it is larger than the sum of its proper divisors (1).

549111689101 is an equidigital number, since it uses as much as digits as its factorization.

549111689101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 46.

The spelling of 549111689101 in words is "five hundred forty-nine billion, one hundred eleven million, six hundred eighty-nine thousand, one hundred one".