123534452005 has 4 divisors (see below), whose sum is σ = 148241342412. Its totient is φ = 98827561600.

The previous prime is 123534451969. The next prime is 123534452009. The reversal of 123534452005 is 500254435321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500254435321 = 11927 ⋅41943023.

It can be written as a sum of positive squares in 2 ways, for example, as 22552230276 + 100982221729 = 150174^2 + 317777^2 .

It is not a de Polignac number, because 123534452005 - 2⁷ = 123534451877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123534452009) 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 3 ways as a sum of consecutive naturals, for example, 12353445196 + ... + 12353445205.

It is an arithmetic number, because the mean of its divisors is an integer number (37060335603).

Almost surely, 2^123534452005 is an apocalyptic number.

It is an amenable number.

123534452005 is a deficient number, since it is larger than the sum of its proper divisors (24706890407).

123534452005 is an equidigital number, since it uses as much as digits as its factorization.

123534452005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24706890406.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 123534452005 its reverse (500254435321), we get a palindrome (623788887326).

The spelling of 123534452005 in words is "one hundred twenty-three billion, five hundred thirty-four million, four hundred fifty-two thousand, five".