12043405505 has 16 divisors (see below), whose sum is σ = 15033988800. Its totient is φ = 9250503360.

The previous prime is 12043405499. The next prime is 12043405519. The reversal of 12043405505 is 50550434021.

It is not a de Polignac number, because 12043405505 - 2¹⁰ = 12043404481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206051 + ... + 257960.

It is an arithmetic number, because the mean of its divisors is an integer number (939624300).

Almost surely, 2^12043405505 is an apocalyptic number.

It is an amenable number.

12043405505 is a deficient number, since it is larger than the sum of its proper divisors (2990583295).

12043405505 is a wasteful number, since it uses less digits than its factorization.

12043405505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464224.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 12043405505 its reverse (50550434021), we get a palindrome (62593839526).

The spelling of 12043405505 in words is "twelve billion, forty-three million, four hundred five thousand, five hundred five".