655544123 has 16 divisors (see below), whose sum is σ = 750345120. Its totient is φ = 567353856.

The previous prime is 655544111. The next prime is 655544129. The reversal of 655544123 is 321445556.

It is a cyclic number.

It is not a de Polignac number, because 655544123 - 2¹⁴ = 655527739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655544129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53936 + ... + 64962.

It is an arithmetic number, because the mean of its divisors is an integer number (46896570).

Almost surely, 2^655544123 is an apocalyptic number.

655544123 is a deficient number, since it is larger than the sum of its proper divisors (94800997).

655544123 is a wasteful number, since it uses less digits than its factorization.

655544123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11326.

The product of its digits is 72000, while the sum is 35.

The square root of 655544123 is about 25603.5958997950. The cubic root of 655544123 is about 868.6949751875.

Adding to 655544123 its reverse (321445556), we get a palindrome (976989679).

The spelling of 655544123 in words is "six hundred fifty-five million, five hundred forty-four thousand, one hundred twenty-three".