744378487609 has 2 divisors, whose sum is σ = 744378487610. Its totient is φ = 744378487608.

The previous prime is 744378487607. The next prime is 744378487639. The reversal of 744378487609 is 906784873447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712977584400 + 31400903209 = 844380^2 + 177203^2 .

It is a cyclic number.

It is not a de Polignac number, because 744378487609 - 2¹ = 744378487607 is a prime.

Together with 744378487607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (744378487607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372189243804 + 372189243805.

It is an arithmetic number, because the mean of its divisors is an integer number (372189243805).

Almost surely, 2^744378487609 is an apocalyptic number.

It is an amenable number.

744378487609 is a deficient number, since it is larger than the sum of its proper divisors (1).

744378487609 is an equidigital number, since it uses as much as digits as its factorization.

744378487609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 227598336, while the sum is 67.

The spelling of 744378487609 in words is "seven hundred forty-four billion, three hundred seventy-eight million, four hundred eighty-seven thousand, six hundred nine".