12178137853 has 4 divisors (see below), whose sum is σ = 13917871840. Its totient is φ = 10438403868.

The previous prime is 12178137809. The next prime is 12178137943. The reversal of 12178137853 is 35873187121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12178137853 - 2¹³ = 12178129661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12178137353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869866983 + ... + 869866996.

It is an arithmetic number, because the mean of its divisors is an integer number (3479467960).

Almost surely, 2^12178137853 is an apocalyptic number.

It is an amenable number.

12178137853 is a deficient number, since it is larger than the sum of its proper divisors (1739733987).

12178137853 is an equidigital number, since it uses as much as digits as its factorization.

12178137853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739733986.

The product of its digits is 282240, while the sum is 46.

The spelling of 12178137853 in words is "twelve billion, one hundred seventy-eight million, one hundred thirty-seven thousand, eight hundred fifty-three".