12405663043 has 4 divisors (see below), whose sum is σ = 12407971320. Its totient is φ = 12403354768.

The previous prime is 12405662963. The next prime is 12405663089. The reversal of 12405663043 is 34036650421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34036650421 = 8629 ⋅3944449.

It is a cyclic number.

It is not a de Polignac number, because 12405663043 - 2²⁵ = 12372108611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12405664043) 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, 1146058 + ... + 1156831.

It is an arithmetic number, because the mean of its divisors is an integer number (3101992830).

Almost surely, 2^12405663043 is an apocalyptic number.

12405663043 is a deficient number, since it is larger than the sum of its proper divisors (2308277).

12405663043 is an equidigital number, since it uses as much as digits as its factorization.

12405663043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308276.

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 12405663043 in words is "twelve billion, four hundred five million, six hundred sixty-three thousand, forty-three".