12138463285 has 16 divisors (see below), whose sum is σ = 15689706480. Its totient is φ = 8962030080.

The previous prime is 12138463283. The next prime is 12138463289. The reversal of 12138463285 is 58236483121.

It can be written as a sum of positive squares in 8 ways, for example, as 7054488081 + 5083975204 = 83991^2 + 71302^2 .

It is not a de Polignac number, because 12138463285 - 2¹ = 12138463283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138463283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382611 + ... + 413119.

It is an arithmetic number, because the mean of its divisors is an integer number (980606655).

Almost surely, 2^12138463285 is an apocalyptic number.

It is an amenable number.

12138463285 is a deficient number, since it is larger than the sum of its proper divisors (3551243195).

12138463285 is a wasteful number, since it uses less digits than its factorization.

12138463285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36648.

The product of its digits is 276480, while the sum is 43.

The spelling of 12138463285 in words is "twelve billion, one hundred thirty-eight million, four hundred sixty-three thousand, two hundred eighty-five".