12315566161181 has 2 divisors, whose sum is σ = 12315566161182. Its totient is φ = 12315566161180.

The previous prime is 12315566161141. The next prime is 12315566161237. The reversal of 12315566161181 is 18116166551321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11855419648900 + 460146512281 = 3443170^2 + 678341^2 .

It is a cyclic number.

It is not a de Polignac number, because 12315566161181 - 2²⁶ = 12315499052317 is a prime.

It is a super-3 number, since 3×12315566161181³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12315566161141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157783080590 + 6157783080591.

It is an arithmetic number, because the mean of its divisors is an integer number (6157783080591).

Almost surely, 2^{12315566161181} is an apocalyptic number.

It is an amenable number.

12315566161181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315566161181 is an equidigital number, since it uses as much as digits as its factorization.

12315566161181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 47.

The spelling of 12315566161181 in words is "twelve trillion, three hundred fifteen billion, five hundred sixty-six million, one hundred sixty-one thousand, one hundred eighty-one".