55516155444 has 144 divisors (see below), whose sum is σ = 146490978816. Its totient is φ = 17707852800.

The previous prime is 55516155437. The next prime is 55516155473. The reversal of 55516155444 is 44455161555.

55516155444 is a `hidden beast` number, since 5 + 5 + 51 + 6 + 1 + 554 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 55516155444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50606704 + ... + 50607800.

It is an arithmetic number, because the mean of its divisors is an integer number (1017298464).

Almost surely, 2^55516155444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55516155444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73245489408).

55516155444 is an abundant number, since it is smaller than the sum of its proper divisors (90974823372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55516155444 is a wasteful number, since it uses less digits than its factorization.

55516155444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606 (or 1601 counting only the distinct ones).

The product of its digits is 1200000, while the sum is 45.

The spelling of 55516155444 in words is "fifty-five billion, five hundred sixteen million, one hundred fifty-five thousand, four hundred forty-four".