12427643285 has 4 divisors (see below), whose sum is σ = 14913171948. Its totient is φ = 9942114624.

The previous prime is 12427643279. The next prime is 12427643309. The reversal of 12427643285 is 58234672421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4820663761 + 7606979524 = 69431^2 + 87218^2 .

It is a cyclic number.

It is not a de Polignac number, because 12427643285 - 2⁴ = 12427643269 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1242764324 + ... + 1242764333.

It is an arithmetic number, because the mean of its divisors is an integer number (3728292987).

Almost surely, 2^12427643285 is an apocalyptic number.

It is an amenable number.

12427643285 is a deficient number, since it is larger than the sum of its proper divisors (2485528663).

12427643285 is an equidigital number, since it uses as much as digits as its factorization.

12427643285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485528662.

The product of its digits is 645120, while the sum is 44.

The spelling of 12427643285 in words is "twelve billion, four hundred twenty-seven million, six hundred forty-three thousand, two hundred eighty-five".