55005550109 has 2 divisors, whose sum is σ = 55005550110. Its totient is φ = 55005550108.

The previous prime is 55005550087. The next prime is 55005550133. The reversal of 55005550109 is 90105550055.

55005550109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54851045209 + 154504900 = 234203^2 + 12430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55005550109 is a prime.

It is a super-2 number, since 2×55005550109² (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 (55005550409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502775054 + 27502775055.

It is an arithmetic number, because the mean of its divisors is an integer number (27502775055).

Almost surely, 2^55005550109 is an apocalyptic number.

It is an amenable number.

55005550109 is a deficient number, since it is larger than the sum of its proper divisors (1).

55005550109 is an equidigital number, since it uses as much as digits as its factorization.

55005550109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28125, while the sum is 35.

The spelling of 55005550109 in words is "fifty-five billion, five million, five hundred fifty thousand, one hundred nine".