6861468181 has 2 divisors, whose sum is σ = 6861468182. Its totient is φ = 6861468180.

The previous prime is 6861468109. The next prime is 6861468193. The reversal of 6861468181 is 1818641686.

It is a happy number.

6861468181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4923267556 + 1938200625 = 70166^2 + 44025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6861468181 is a prime.

It is a super-2 number, since 2×6861468181² = 94159491197750897522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6861468281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430734090 + 3430734091.

It is an arithmetic number, because the mean of its divisors is an integer number (3430734091).

Almost surely, 2^6861468181 is an apocalyptic number.

It is an amenable number.

6861468181 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861468181 is an equidigital number, since it uses as much as digits as its factorization.

6861468181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 49.

The square root of 6861468181 is about 82833.9796279281. The cubic root of 6861468181 is about 1900.2278748850.

The spelling of 6861468181 in words is "six billion, eight hundred sixty-one million, four hundred sixty-eight thousand, one hundred eighty-one".