15444052009 has 2 divisors, whose sum is σ = 15444052010. Its totient is φ = 15444052008.

The previous prime is 15444051943. The next prime is 15444052027. The reversal of 15444052009 is 90025044451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15049155625 + 394896384 = 122675^2 + 19872^2 .

It is a cyclic number.

It is not a de Polignac number, because 15444052009 - 2¹³ = 15444043817 is a prime.

It is not a weakly prime, because it can be changed into another prime (15444052069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7722026004 + 7722026005.

It is an arithmetic number, because the mean of its divisors is an integer number (7722026005).

Almost surely, 2^15444052009 is an apocalyptic number.

It is an amenable number.

15444052009 is a deficient number, since it is larger than the sum of its proper divisors (1).

15444052009 is an equidigital number, since it uses as much as digits as its factorization.

15444052009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 15444052009 in words is "fifteen billion, four hundred forty-four million, fifty-two thousand, nine".