55544003321 has 4 divisors (see below), whose sum is σ = 58811297652. Its totient is φ = 52276708992.

The previous prime is 55544003309. The next prime is 55544003351. The reversal of 55544003321 is 12330044555.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36256348921 + 19287654400 = 190411^2 + 138880^2 .

It is a cyclic number.

It is not a de Polignac number, because 55544003321 - 2¹⁸ = 55543741177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55544003351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1633647140 + ... + 1633647173.

It is an arithmetic number, because the mean of its divisors is an integer number (14702824413).

Almost surely, 2^55544003321 is an apocalyptic number.

It is an amenable number.

55544003321 is a deficient number, since it is larger than the sum of its proper divisors (3267294331).

55544003321 is a wasteful number, since it uses less digits than its factorization.

55544003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267294330.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 55544003321 its reverse (12330044555), we get a palindrome (67874047876).

The spelling of 55544003321 in words is "fifty-five billion, five hundred forty-four million, three thousand, three hundred twenty-one".