6231681361 has 2 divisors, whose sum is σ = 6231681362. Its totient is φ = 6231681360.

The previous prime is 6231681343. The next prime is 6231681487. The reversal of 6231681361 is 1631861326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6108360336 + 123321025 = 78156^2 + 11105^2 .

It is a cyclic number.

It is not a de Polignac number, because 6231681361 - 2⁷ = 6231681233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6231681361.

It is not a weakly prime, because it can be changed into another prime (6231681311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3115840680 + 3115840681.

It is an arithmetic number, because the mean of its divisors is an integer number (3115840681).

Almost surely, 2^6231681361 is an apocalyptic number.

It is an amenable number.

6231681361 is a deficient number, since it is larger than the sum of its proper divisors (1).

6231681361 is an equidigital number, since it uses as much as digits as its factorization.

6231681361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 6231681361 is about 78940.9992399387. Note that the first 3 decimals coincide. The cubic root of 6231681361 is about 1840.2143497331.

The spelling of 6231681361 in words is "six billion, two hundred thirty-one million, six hundred eighty-one thousand, three hundred sixty-one".