55105421544 has 48 divisors (see below), whose sum is σ = 150001471620. Its totient is φ = 18275228160.

The previous prime is 55105421531. The next prime is 55105421621. The reversal of 55105421544 is 44512450155.

55105421544 is a `hidden beast` number, since 5 + 5 + 105 + 4 + 2 + 1 + 544 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46980562500 + 8124859044 = 216750^2 + 90138^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55105421499 and 55105421508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1928337 + ... + 1956704.

Almost surely, 2^55105421544 is an apocalyptic number.

It is an amenable number.

55105421544 is an abundant number, since it is smaller than the sum of its proper divisors (94896050076).

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

55105421544 is a wasteful number, since it uses less digits than its factorization.

55105421544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885250 (or 3885243 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 55105421544 its reverse (44512450155), we get a palindrome (99617871699).

The spelling of 55105421544 in words is "fifty-five billion, one hundred five million, four hundred twenty-one thousand, five hundred forty-four".