55000505009 has 4 divisors (see below), whose sum is σ = 56774714880. Its totient is φ = 53226295140.

The previous prime is 55000504987. The next prime is 55000505023. The reversal of 55000505009 is 90050500055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90050500055 = 5 ⋅18010100011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55000505009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55000505309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887104889 + ... + 887104950.

It is an arithmetic number, because the mean of its divisors is an integer number (14193678720).

Almost surely, 2^55000505009 is an apocalyptic number.

It is an amenable number.

55000505009 is a deficient number, since it is larger than the sum of its proper divisors (1774209871).

55000505009 is a wasteful number, since it uses less digits than its factorization.

55000505009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774209870.

The product of its (nonzero) digits is 5625, while the sum is 29.

The spelling of 55000505009 in words is "fifty-five billion, five hundred five thousand, nine".