63444753409 has 2 divisors, whose sum is σ = 63444753410. Its totient is φ = 63444753408.

The previous prime is 63444753391. The next prime is 63444753433. The reversal of 63444753409 is 90435744436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60788381809 + 2656371600 = 246553^2 + 51540^2 .

It is a cyclic number.

It is not a de Polignac number, because 63444753409 - 2⁹ = 63444752897 is a prime.

It is not a weakly prime, because it can be changed into another prime (63444753439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31722376704 + 31722376705.

It is an arithmetic number, because the mean of its divisors is an integer number (31722376705).

Almost surely, 2^63444753409 is an apocalyptic number.

It is an amenable number.

63444753409 is a deficient number, since it is larger than the sum of its proper divisors (1).

63444753409 is an equidigital number, since it uses as much as digits as its factorization.

63444753409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 63444753409 in words is "sixty-three billion, four hundred forty-four million, seven hundred fifty-three thousand, four hundred nine".