5555561109 has 16 divisors (see below), whose sum is σ = 8469248640. Its totient is φ = 3173244480.

The previous prime is 5555561021. The next prime is 5555561147. The reversal of 5555561109 is 9011655555.

It is not a de Polignac number, because 5555561109 - 2⁷ = 5555560981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555561309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5554 + ... + 105555.

It is an arithmetic number, because the mean of its divisors is an integer number (529328040).

Almost surely, 2^5555561109 is an apocalyptic number.

It is an amenable number.

5555561109 is a deficient number, since it is larger than the sum of its proper divisors (2913687531).

5555561109 is a wasteful number, since it uses less digits than its factorization.

5555561109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113500.

The product of its (nonzero) digits is 168750, while the sum is 42.

The square root of 5555561109 is about 74535.6365036215. The cubic root of 5555561109 is about 1771.0982054457.

The spelling of 5555561109 in words is "five billion, five hundred fifty-five million, five hundred sixty-one thousand, one hundred nine".