12455500405 has 4 divisors (see below), whose sum is σ = 14946600492. Its totient is φ = 9964400320.

The previous prime is 12455500367. The next prime is 12455500411. The reversal of 12455500405 is 50400555421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50400555421 = 47 ⋅1072352243.

It can be written as a sum of positive squares in 2 ways, for example, as 3176224164 + 9279276241 = 56358^2 + 96329^2 .

It is not a de Polignac number, because 12455500405 - 2¹¹ = 12455498357 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245550036 + ... + 1245550045.

It is an arithmetic number, because the mean of its divisors is an integer number (3736650123).

Almost surely, 2^12455500405 is an apocalyptic number.

It is an amenable number.

12455500405 is a deficient number, since it is larger than the sum of its proper divisors (2491100087).

12455500405 is an equidigital number, since it uses as much as digits as its factorization.

12455500405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491100086.

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 12455500405 in words is "twelve billion, four hundred fifty-five million, five hundred thousand, four hundred five".