55505560996909 has 4 divisors (see below), whose sum is σ = 55682895057916. Its totient is φ = 55328226935904.

The previous prime is 55505560996843. The next prime is 55505560996969. The reversal of 55505560996909 is 90969906550555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9106603821225 + 46398957175684 = 3017715^2 + 6811678^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505560996909 - 2⁹ = 55505560996397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505560996969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88667030034 + ... + 88667030659.

It is an arithmetic number, because the mean of its divisors is an integer number (13920723764479).

Almost surely, 2^{55505560996909} is an apocalyptic number.

It is an amenable number.

55505560996909 is a deficient number, since it is larger than the sum of its proper divisors (177334061007).

55505560996909 is a wasteful number, since it uses less digits than its factorization.

55505560996909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177334061006.

The product of its (nonzero) digits is 738112500, while the sum is 73.

The spelling of 55505560996909 in words is "fifty-five trillion, five hundred five billion, five hundred sixty million, nine hundred ninety-six thousand, nine hundred nine".