12125784853 has 18 divisors (see below), whose sum is σ = 15194026134. Its totient is φ = 9591828624.

The previous prime is 12125784817. The next prime is 12125784859. The reversal of 12125784853 is 35848752121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8394774129 + 3731010724 = 91623^2 + 61082^2 .

It is not a de Polignac number, because 12125784853 - 2²¹ = 12123687701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125784859) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2777050 + ... + 2781412.

It is an arithmetic number, because the mean of its divisors is an integer number (844112563).

Almost surely, 2^12125784853 is an apocalyptic number.

12125784853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12125784853 is a deficient number, since it is larger than the sum of its proper divisors (3068241281).

12125784853 is an frugal number, since it uses more digits than its factorization.

12125784853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8753 (or 4383 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The spelling of 12125784853 in words is "twelve billion, one hundred twenty-five million, seven hundred eighty-four thousand, eight hundred fifty-three".