12444278287 has 6 divisors (see below), whose sum is σ = 14475997248. Its totient is φ = 10666524204.

The previous prime is 12444278281. The next prime is 12444278293. The reversal of 12444278287 is 78287244421.

It is an interprime number because it is at equal distance from previous prime (12444278281) and next prime (12444278293).

It is not a de Polignac number, because 12444278287 - 2³ = 12444278279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 253964863 = 12444278287 / (1 + 2 + 4 + 4 + 4 + 2 + 7 + 8 + 2 + 8 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12444278287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444278281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126982383 + ... + 126982480.

It is an arithmetic number, because the mean of its divisors is an integer number (2412666208).

Almost surely, 2^12444278287 is an apocalyptic number.

12444278287 is a deficient number, since it is larger than the sum of its proper divisors (2031718961).

12444278287 is an equidigital number, since it uses as much as digits as its factorization.

12444278287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253964877 (or 253964870 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 49.

The spelling of 12444278287 in words is "twelve billion, four hundred forty-four million, two hundred seventy-eight thousand, two hundred eighty-seven".