55204161550503 has 96 divisors (see below), whose sum is σ = 87840060482304. Its totient is φ = 30740269367808.

The previous prime is 55204161550501. The next prime is 55204161550513. The reversal of 55204161550503 is 30505516140255.

It is a happy number.

It is not a de Polignac number, because 55204161550503 - 2¹ = 55204161550501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55204161550501) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 350929875 + ... + 351087147.

It is an arithmetic number, because the mean of its divisors is an integer number (915000630024).

Almost surely, 2^{55204161550503} is an apocalyptic number.

55204161550503 is a deficient number, since it is larger than the sum of its proper divisors (32635898931801).

55204161550503 is a wasteful number, since it uses less digits than its factorization.

55204161550503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157741 (or 157734 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 42.

Adding to 55204161550503 its reverse (30505516140255), we get a palindrome (85709677690758).

The spelling of 55204161550503 in words is "fifty-five trillion, two hundred four billion, one hundred sixty-one million, five hundred fifty thousand, five hundred three".