63444010909 has 2 divisors, whose sum is σ = 63444010910. Its totient is φ = 63444010908.

The previous prime is 63444010849. The next prime is 63444010939. The reversal of 63444010909 is 90901044436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35324074809 + 28119936100 = 187947^2 + 167690^2 .

It is a cyclic number.

It is not a de Polignac number, because 63444010909 - 2⁹ = 63444010397 is a prime.

It is a super-2 number, since 2×63444010909² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63444010939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31722005454 + 31722005455.

It is an arithmetic number, because the mean of its divisors is an integer number (31722005455).

Almost surely, 2^63444010909 is an apocalyptic number.

It is an amenable number.

63444010909 is a deficient number, since it is larger than the sum of its proper divisors (1).

63444010909 is an equidigital number, since it uses as much as digits as its factorization.

63444010909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 63444010909 in words is "sixty-three billion, four hundred forty-four million, ten thousand, nine hundred nine".