55544444555 has 4 divisors (see below), whose sum is σ = 66653333472. Its totient is φ = 44435555640.

The previous prime is 55544444521. The next prime is 55544444563.

It is a happy number.

55544444555 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55544444555 - 2¹⁴ = 55544428171 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5554444451 + ... + 5554444460.

It is an arithmetic number, because the mean of its divisors is an integer number (16663333368).

Almost surely, 2^55544444555 is an apocalyptic number.

55544444555 is a deficient number, since it is larger than the sum of its proper divisors (11108888917).

55544444555 is a wasteful number, since it uses less digits than its factorization.

55544444555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11108888916.

The product of its digits is 16000000, while the sum is 50.

The spelling of 55544444555 in words is "fifty-five billion, five hundred forty-four million, four hundred forty-four thousand, five hundred fifty-five".