545405123223 has 20 divisors (see below), whose sum is σ = 816032253168. Its totient is φ = 363027147840.

The previous prime is 545405123189. The next prime is 545405123231. The reversal of 545405123223 is 322321504545.

545405123223 is a `hidden beast` number, since 5 + 4 + 5 + 405 + 1 + 23 + 223 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-545405123223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545405123273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5284386 + ... + 5386607.

Almost surely, 2^545405123223 is an apocalyptic number.

545405123223 is a deficient number, since it is larger than the sum of its proper divisors (270627129945).

545405123223 is a wasteful number, since it uses less digits than its factorization.

545405123223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10671636 (or 10671627 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 545405123223 its reverse (322321504545), we get a palindrome (867726627768).

The spelling of 545405123223 in words is "five hundred forty-five billion, four hundred five million, one hundred twenty-three thousand, two hundred twenty-three".