123104430505 has 16 divisors (see below), whose sum is σ = 170377827840. Its totient is φ = 83640019392.

The previous prime is 123104430503. The next prime is 123104430511. The reversal of 123104430505 is 505034401321.

It is a cyclic number.

It is not a de Polignac number, because 123104430505 - 2¹ = 123104430503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123104430503) 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, 16130449 + ... + 16138078.

It is an arithmetic number, because the mean of its divisors is an integer number (10648614240).

Almost surely, 2^123104430505 is an apocalyptic number.

It is an amenable number.

123104430505 is a deficient number, since it is larger than the sum of its proper divisors (47273397335).

123104430505 is a wasteful number, since it uses less digits than its factorization.

123104430505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32268648.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 123104430505 its reverse (505034401321), we get a palindrome (628138831826).

The spelling of 123104430505 in words is "one hundred twenty-three billion, one hundred four million, four hundred thirty thousand, five hundred five".