6340118381 has 2 divisors, whose sum is σ = 6340118382. Its totient is φ = 6340118380.

The previous prime is 6340118371. The next prime is 6340118413. The reversal of 6340118381 is 1838110436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3305100100 + 3035018281 = 57490^2 + 55091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6340118381 is a prime.

It is a super-2 number, since 2×6340118381² = 80394202170188122322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6340118371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3170059190 + 3170059191.

It is an arithmetic number, because the mean of its divisors is an integer number (3170059191).

Almost surely, 2^6340118381 is an apocalyptic number.

It is an amenable number.

6340118381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6340118381 is an equidigital number, since it uses as much as digits as its factorization.

6340118381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 6340118381 is about 79624.8603201287. The cubic root of 6340118381 is about 1850.8268406225.

The spelling of 6340118381 in words is "six billion, three hundred forty million, one hundred eighteen thousand, three hundred eighty-one".