543643611362161 has 2 divisors, whose sum is σ = 543643611362162. Its totient is φ = 543643611362160.

The previous prime is 543643611362123. The next prime is 543643611362167. The reversal of 543643611362161 is 161263116346345.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488717503585936 + 54926107776225 = 22106956^2 + 7411215^2 .

It is a cyclic number.

It is not a de Polignac number, because 543643611362161 - 2²³ = 543643602973553 is a prime.

It is a super-3 number, since 3×543643611362161³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 543643611362099 and 543643611362108.

It is not a weakly prime, because it can be changed into another prime (543643611362167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271821805681080 + 271821805681081.

It is an arithmetic number, because the mean of its divisors is an integer number (271821805681081).

Almost surely, 2^{543643611362161} is an apocalyptic number.

It is an amenable number.

543643611362161 is a deficient number, since it is larger than the sum of its proper divisors (1).

543643611362161 is an equidigital number, since it uses as much as digits as its factorization.

543643611362161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 52.

The spelling of 543643611362161 in words is "five hundred forty-three trillion, six hundred forty-three billion, six hundred eleven million, three hundred sixty-two thousand, one hundred sixty-one".