15550450009 has 2 divisors, whose sum is σ = 15550450010. Its totient is φ = 15550450008.

The previous prime is 15550449997. The next prime is 15550450043. The reversal of 15550450009 is 90005405551.

15550450009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (15550450043) can be obtained adding 15550450009 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10821824784 + 4728625225 = 104028^2 + 68765^2 .

It is an emirp because it is prime and its reverse (90005405551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15550450009 - 2¹³ = 15550441817 is a prime.

It is not a weakly prime, because it can be changed into another prime (15550450099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775225004 + 7775225005.

It is an arithmetic number, because the mean of its divisors is an integer number (7775225005).

Almost surely, 2^15550450009 is an apocalyptic number.

It is an amenable number.

15550450009 is a deficient number, since it is larger than the sum of its proper divisors (1).

15550450009 is an equidigital number, since it uses as much as digits as its factorization.

15550450009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 15550450009 in words is "fifteen billion, five hundred fifty million, four hundred fifty thousand, nine".