123444534523 has 4 divisors (see below), whose sum is σ = 127701242640. Its totient is φ = 119187826408.

The previous prime is 123444534511. The next prime is 123444534557. The reversal of 123444534523 is 325435444321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123444534523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123444534223) 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, 2128354015 + ... + 2128354072.

It is an arithmetic number, because the mean of its divisors is an integer number (31925310660).

Almost surely, 2^123444534523 is an apocalyptic number.

123444534523 is a deficient number, since it is larger than the sum of its proper divisors (4256708117).

123444534523 is an equidigital number, since it uses as much as digits as its factorization.

123444534523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256708116.

The product of its digits is 691200, while the sum is 40.

Adding to 123444534523 its reverse (325435444321), we get a palindrome (448879978844).

The spelling of 123444534523 in words is "one hundred twenty-three billion, four hundred forty-four million, five hundred thirty-four thousand, five hundred twenty-three".