55204111623 has 4 divisors (see below), whose sum is σ = 73605482168. Its totient is φ = 36802741080.

The previous prime is 55204111601. The next prime is 55204111637. The reversal of 55204111623 is 32611140255.

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

It is not a de Polignac number, because 55204111623 - 2⁶ = 55204111559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55204111643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9200685268 + ... + 9200685273.

It is an arithmetic number, because the mean of its divisors is an integer number (18401370542).

Almost surely, 2^55204111623 is an apocalyptic number.

55204111623 is a deficient number, since it is larger than the sum of its proper divisors (18401370545).

55204111623 is a wasteful number, since it uses less digits than its factorization.

55204111623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18401370544.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 55204111623 its reverse (32611140255), we get a palindrome (87815251878).

The spelling of 55204111623 in words is "fifty-five billion, two hundred four million, one hundred eleven thousand, six hundred twenty-three".