12450511405 has 4 divisors (see below), whose sum is σ = 14940613692. Its totient is φ = 9960409120.

The previous prime is 12450511399. The next prime is 12450511417. The reversal of 12450511405 is 50411505421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50411505421 = 113 ⋅446119517.

It can be written as a sum of positive squares in 2 ways, for example, as 4529155401 + 7921356004 = 67299^2 + 89002^2 .

It is not a de Polignac number, because 12450511405 - 2³ = 12450511397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1245051136 + ... + 1245051145.

It is an arithmetic number, because the mean of its divisors is an integer number (3735153423).

Almost surely, 2^12450511405 is an apocalyptic number.

It is an amenable number.

12450511405 is a deficient number, since it is larger than the sum of its proper divisors (2490102287).

12450511405 is an equidigital number, since it uses as much as digits as its factorization.

12450511405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490102286.

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 12450511405 in words is "twelve billion, four hundred fifty million, five hundred eleven thousand, four hundred five".