8115815461181 has 2 divisors, whose sum is σ = 8115815461182. Its totient is φ = 8115815461180.

The previous prime is 8115815461141. The next prime is 8115815461183. The reversal of 8115815461181 is 1811645185118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4772000929081 + 3343814532100 = 2184491^2 + 1828610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8115815461181 is a prime.

It is a super-2 number, since 2×8115815461181² (a number of 27 digits) contains 22 as substring.

Together with 8115815461183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8115815461183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4057907730590 + 4057907730591.

It is an arithmetic number, because the mean of its divisors is an integer number (4057907730591).

Almost surely, 2^{8115815461181} is an apocalyptic number.

It is an amenable number.

8115815461181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8115815461181 is an equidigital number, since it uses as much as digits as its factorization.

8115815461181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 307200, while the sum is 50.

The spelling of 8115815461181 in words is "eight trillion, one hundred fifteen billion, eight hundred fifteen million, four hundred sixty-one thousand, one hundred eighty-one".