55381118117 has 4 divisors (see below), whose sum is σ = 59641204140. Its totient is φ = 51121032096.

The previous prime is 55381118099. The next prime is 55381118131. The reversal of 55381118117 is 71181118355.

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 33191738596 + 22189379521 = 182186^2 + 148961^2 .

It is a cyclic number.

It is not a de Polignac number, because 55381118117 - 2⁸ = 55381117861 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 (55381148117) 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, 2130042992 + ... + 2130043017.

It is an arithmetic number, because the mean of its divisors is an integer number (14910301035).

Almost surely, 2^55381118117 is an apocalyptic number.

It is an amenable number.

55381118117 is a deficient number, since it is larger than the sum of its proper divisors (4260086023).

55381118117 is a wasteful number, since it uses less digits than its factorization.

55381118117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260086022.

The product of its digits is 33600, while the sum is 41.

The spelling of 55381118117 in words is "fifty-five billion, three hundred eighty-one million, one hundred eighteen thousand, one hundred seventeen".