55218118894849 has 4 divisors (see below), whose sum is σ = 55228719422020. Its totient is φ = 55207518367680.

The previous prime is 55218118894843. The next prime is 55218118894903. The reversal of 55218118894849 is 94849881181255.

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 54074962330624 + 1143156564225 = 7353568^2 + 1069185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55218118894849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55218118894843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300255772 + ... + 5300266189.

It is an arithmetic number, because the mean of its divisors is an integer number (13807179855505).

Almost surely, 2^{55218118894849} is an apocalyptic number.

It is an amenable number.

55218118894849 is a deficient number, since it is larger than the sum of its proper divisors (10600527171).

55218118894849 is a wasteful number, since it uses less digits than its factorization.

55218118894849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600527170.

The product of its digits is 265420800, while the sum is 73.

The spelling of 55218118894849 in words is "fifty-five trillion, two hundred eighteen billion, one hundred eighteen million, eight hundred ninety-four thousand, eight hundred forty-nine".