12134423281649 has 4 divisors (see below), whose sum is σ = 12172702219764. Its totient is φ = 12096144343536.

The previous prime is 12134423281639. The next prime is 12134423281657. The reversal of 12134423281649 is 94618232443121.

It is a happy number.

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 1208225251249 + 10926198030400 = 1099193^2 + 3305480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12134423281649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12134423281597 and 12134423281606.

It is not an unprimeable number, because it can be changed into a prime (12134423281639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19139468582 + ... + 19139469215.

It is an arithmetic number, because the mean of its divisors is an integer number (3043175554941).

Almost surely, 2^{12134423281649} is an apocalyptic number.

It is an amenable number.

12134423281649 is a deficient number, since it is larger than the sum of its proper divisors (38278938115).

12134423281649 is an equidigital number, since it uses as much as digits as its factorization.

12134423281649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38278938114.

The product of its digits is 1990656, while the sum is 50.

The spelling of 12134423281649 in words is "twelve trillion, one hundred thirty-four billion, four hundred twenty-three million, two hundred eighty-one thousand, six hundred forty-nine".