55555600109 has 4 divisors (see below), whose sum is σ = 58823576604. Its totient is φ = 52287623616.

The previous prime is 55555600097. The next prime is 55555600153. The reversal of 55555600109 is 90100655555.

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 41240674084 + 14314926025 = 203078^2 + 119645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55555600109 is a prime.

It is a super-2 number, since 2×55555600109² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555600909) 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, 1633988222 + ... + 1633988255.

It is an arithmetic number, because the mean of its divisors is an integer number (14705894151).

Almost surely, 2^55555600109 is an apocalyptic number.

It is an amenable number.

55555600109 is a deficient number, since it is larger than the sum of its proper divisors (3267976495).

55555600109 is a wasteful number, since it uses less digits than its factorization.

55555600109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267976494.

The product of its (nonzero) digits is 168750, while the sum is 41.

The spelling of 55555600109 in words is "fifty-five billion, five hundred fifty-five million, six hundred thousand, one hundred nine".