55186103893 has 4 divisors (see below), whose sum is σ = 55245001420. Its totient is φ = 55127206368.

The previous prime is 55186103867. The next prime is 55186103911. The reversal of 55186103893 is 39830168155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39830168155 = 5 ⋅7966033631.

It can be written as a sum of positive squares in 2 ways, for example, as 6961065489 + 48225038404 = 83433^2 + 219602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55186103893 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 (55186106893) 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, 29447358 + ... + 29449231.

It is an arithmetic number, because the mean of its divisors is an integer number (13811250355).

Almost surely, 2^55186103893 is an apocalyptic number.

It is an amenable number.

55186103893 is a deficient number, since it is larger than the sum of its proper divisors (58897527).

55186103893 is an equidigital number, since it uses as much as digits as its factorization.

55186103893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58897526.

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 55186103893 in words is "fifty-five billion, one hundred eighty-six million, one hundred three thousand, eight hundred ninety-three".