6944381319509 has 2 divisors, whose sum is σ = 6944381319510. Its totient is φ = 6944381319508.

The previous prime is 6944381319433. The next prime is 6944381319539. The reversal of 6944381319509 is 9059131834496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4574906043409 + 2369475276100 = 2138903^2 + 1539310^2 .

It is a cyclic number.

It is not a de Polignac number, because 6944381319509 - 2¹⁶ = 6944381253973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6944381319539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472190659754 + 3472190659755.

It is an arithmetic number, because the mean of its divisors is an integer number (3472190659755).

Almost surely, 2^{6944381319509} is an apocalyptic number.

It is an amenable number.

6944381319509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6944381319509 is an equidigital number, since it uses as much as digits as its factorization.

6944381319509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25194240, while the sum is 62.

The spelling of 6944381319509 in words is "six trillion, nine hundred forty-four billion, three hundred eighty-one million, three hundred nineteen thousand, five hundred nine".