5555549509 has 2 divisors, whose sum is σ = 5555549510. Its totient is φ = 5555549508.

The previous prime is 5555549497. The next prime is 5555549521. The reversal of 5555549509 is 9059455555.

It is a balanced prime because it is at equal distance from previous prime (5555549497) and next prime (5555549521).

It can be written as a sum of positive squares in only one way, i.e., 5461653409 + 93896100 = 73903^2 + 9690^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555549509 - 2⁷ = 5555549381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5555549539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777774754 + 2777774755.

It is an arithmetic number, because the mean of its divisors is an integer number (2777774755).

Almost surely, 2^5555549509 is an apocalyptic number.

It is an amenable number.

5555549509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555549509 is an equidigital number, since it uses as much as digits as its factorization.

5555549509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5062500, while the sum is 52.

The square root of 5555549509 is about 74535.5586884542. The cubic root of 5555549509 is about 1771.0969727617.

The spelling of 5555549509 in words is "five billion, five hundred fifty-five million, five hundred forty-nine thousand, five hundred nine".