12078449605 has 4 divisors (see below), whose sum is σ = 14494139532. Its totient is φ = 9662759680.

The previous prime is 12078449599. The next prime is 12078449633. The reversal of 12078449605 is 50694487021.

It is a Cunningham number, because it is equal to 109902²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50694487021 = 91841 ⋅551981.

It can be written as a sum of positive squares in 2 ways, for example, as 4348347364 + 7730102241 = 65942^2 + 87921^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12078449605 is a prime.

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, 1207844956 + ... + 1207844965.

It is an arithmetic number, because the mean of its divisors is an integer number (3623534883).

Almost surely, 2^12078449605 is an apocalyptic number.

It is an amenable number.

12078449605 is a deficient number, since it is larger than the sum of its proper divisors (2415689927).

12078449605 is an equidigital number, since it uses as much as digits as its factorization.

12078449605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415689926.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 12078449605 in words is "twelve billion, seventy-eight million, four hundred forty-nine thousand, six hundred five".