6844613381 has 2 divisors, whose sum is σ = 6844613382. Its totient is φ = 6844613380.

The previous prime is 6844613353. The next prime is 6844613383. The reversal of 6844613381 is 1833164486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4815110881 + 2029502500 = 69391^2 + 45050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6844613381 is a prime.

It is a super-2 number, since 2×6844613381² = 93697464670728502322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 6844613383, it forms a pair of twin primes.

It is a Chen 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 (6844613383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422306690 + 3422306691.

It is an arithmetic number, because the mean of its divisors is an integer number (3422306691).

Almost surely, 2^6844613381 is an apocalyptic number.

It is an amenable number.

6844613381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6844613381 is an equidigital number, since it uses as much as digits as its factorization.

6844613381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The square root of 6844613381 is about 82732.1786308085. The cubic root of 6844613381 is about 1898.6706658090.

The spelling of 6844613381 in words is "six billion, eight hundred forty-four million, six hundred thirteen thousand, three hundred eighty-one".