12158645834 has 4 divisors (see below), whose sum is σ = 18237968754. Its totient is φ = 6079322916.

The previous prime is 12158645833. The next prime is 12158645857. The reversal of 12158645834 is 43854685121.

12158645834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 8653650625 + 3504995209 = 93025^2 + 59203^2 .

It is not an unprimeable number, because it can be changed into a prime (12158645833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3039661457 + ... + 3039661460.

Almost surely, 2^12158645834 is an apocalyptic number.

12158645834 is a deficient number, since it is larger than the sum of its proper divisors (6079322920).

12158645834 is an equidigital number, since it uses as much as digits as its factorization.

12158645834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079322919.

The product of its digits is 921600, while the sum is 47.

The spelling of 12158645834 in words is "twelve billion, one hundred fifty-eight million, six hundred forty-five thousand, eight hundred thirty-four".