55421818187 has 8 divisors (see below), whose sum is σ = 59061920256. Its totient is φ = 51884254312.

The previous prime is 55421818171. The next prime is 55421818241. The reversal of 55421818187 is 78181812455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55421818187 - 2⁴ = 55421818171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55421818147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25633433 + ... + 25635594.

It is an arithmetic number, because the mean of its divisors is an integer number (7382740032).

Almost surely, 2^55421818187 is an apocalyptic number.

55421818187 is a deficient number, since it is larger than the sum of its proper divisors (3640102069).

55421818187 is a wasteful number, since it uses less digits than its factorization.

55421818187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51269097.

The product of its digits is 716800, while the sum is 50.

The spelling of 55421818187 in words is "fifty-five billion, four hundred twenty-one million, eight hundred eighteen thousand, one hundred eighty-seven".