55123321120044 has 24 divisors (see below), whose sum is σ = 128747058237168. Its totient is φ = 18356443855680.

The previous prime is 55123321120013. The next prime is 55123321120067. The reversal of 55123321120044 is 44002112332155.

It is a junction number, because it is equal to n+sod(n) for n = 55123321119987 and 55123321120014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249551947 + ... + 2249576450.

It is an arithmetic number, because the mean of its divisors is an integer number (5364460759882).

Almost surely, 2^{55123321120044} is an apocalyptic number.

It is an amenable number.

55123321120044 is an abundant number, since it is smaller than the sum of its proper divisors (73623737117124).

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

55123321120044 is a wasteful number, since it uses less digits than its factorization.

55123321120044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499129425 (or 4499129423 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 55123321120044 its reverse (44002112332155), we get a palindrome (99125433452199).

The spelling of 55123321120044 in words is "fifty-five trillion, one hundred twenty-three billion, three hundred twenty-one million, one hundred twenty thousand, forty-four".