123204553523 has 4 divisors (see below), whose sum is σ = 123207604800. Its totient is φ = 123201502248.

The previous prime is 123204553481. The next prime is 123204553531. The reversal of 123204553523 is 325355402321.

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

It is a cyclic number.

It is not a de Polignac number, because 123204553523 - 2²⁰ = 123203504947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123204553573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464248 + ... + 1546101.

It is an arithmetic number, because the mean of its divisors is an integer number (30801901200).

Almost surely, 2^123204553523 is an apocalyptic number.

123204553523 is a deficient number, since it is larger than the sum of its proper divisors (3051277).

123204553523 is an equidigital number, since it uses as much as digits as its factorization.

123204553523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051276.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 123204553523 its reverse (325355402321), we get a palindrome (448559955844).

The spelling of 123204553523 in words is "one hundred twenty-three billion, two hundred four million, five hundred fifty-three thousand, five hundred twenty-three".