5500555280161 has 2 divisors, whose sum is σ = 5500555280162. Its totient is φ = 5500555280160.

The previous prime is 5500555280159. The next prime is 5500555280167. The reversal of 5500555280161 is 1610825550055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3536114767936 + 1964440512225 = 1880456^2 + 1401585^2 .

It is a cyclic number.

It is not a de Polignac number, because 5500555280161 - 2¹ = 5500555280159 is a prime.

It is a super-2 number, since 2×5500555280161² (a number of 26 digits) contains 22 as substring.

Together with 5500555280159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5500555280167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750277640080 + 2750277640081.

It is an arithmetic number, because the mean of its divisors is an integer number (2750277640081).

Almost surely, 2^{5500555280161} is an apocalyptic number.

It is an amenable number.

5500555280161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5500555280161 is an equidigital number, since it uses as much as digits as its factorization.

5500555280161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300000, while the sum is 43.

The spelling of 5500555280161 in words is "five trillion, five hundred billion, five hundred fifty-five million, two hundred eighty thousand, one hundred sixty-one".