6944743649 has 2 divisors, whose sum is σ = 6944743650. Its totient is φ = 6944743648.

The previous prime is 6944743639. The next prime is 6944743657. The reversal of 6944743649 is 9463474496.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6910929424 + 33814225 = 83132^2 + 5815^2 .

It is a cyclic number.

It is not a de Polignac number, because 6944743649 - 2²⁴ = 6927966433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6944743594 and 6944743603.

It is not a weakly prime, because it can be changed into another prime (6944743609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472371824 + 3472371825.

It is an arithmetic number, because the mean of its divisors is an integer number (3472371825).

Almost surely, 2^6944743649 is an apocalyptic number.

It is an amenable number.

6944743649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6944743649 is an equidigital number, since it uses as much as digits as its factorization.

6944743649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 56.

The square root of 6944743649 is about 83335.1285413300. The cubic root of 6944743649 is about 1907.8844708260.

The spelling of 6944743649 in words is "six billion, nine hundred forty-four million, seven hundred forty-three thousand, six hundred forty-nine".