12423449278 has 16 divisors (see below), whose sum is σ = 20212615584. Its totient is φ = 5703735040.

The previous prime is 12423449257. The next prime is 12423449317. The reversal of 12423449278 is 87294432421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4454650 + ... + 4457437.

It is an arithmetic number, because the mean of its divisors is an integer number (1263288474).

Almost surely, 2^12423449278 is an apocalyptic number.

12423449278 is a deficient number, since it is larger than the sum of its proper divisors (7789166306).

12423449278 is a wasteful number, since it uses less digits than its factorization.

12423449278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912147.

The product of its digits is 774144, while the sum is 46.

The spelling of 12423449278 in words is "twelve billion, four hundred twenty-three million, four hundred forty-nine thousand, two hundred seventy-eight".