12405235513 has 4 divisors (see below), whose sum is σ = 13532984208. Its totient is φ = 11277486820.

The previous prime is 12405235483. The next prime is 12405235573. The reversal of 12405235513 is 31553250421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12405235513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12405235573) 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, 563874331 + ... + 563874352.

It is an arithmetic number, because the mean of its divisors is an integer number (3383246052).

Almost surely, 2^12405235513 is an apocalyptic number.

It is an amenable number.

12405235513 is a deficient number, since it is larger than the sum of its proper divisors (1127748695).

12405235513 is a wasteful number, since it uses less digits than its factorization.

12405235513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127748694.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 12405235513 its reverse (31553250421), we get a palindrome (43958485934).

The spelling of 12405235513 in words is "twelve billion, four hundred five million, two hundred thirty-five thousand, five hundred thirteen".