12161829157 has 4 divisors (see below), whose sum is σ = 12179179116. Its totient is φ = 12144479200.

The previous prime is 12161829107. The next prime is 12161829217. The reversal of 12161829157 is 75192816121.

12161829157 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 2 ways, for example, as 7286158881 + 4875670276 = 85359^2 + 69826^2 .

It is a cyclic number.

It is not a de Polignac number, because 12161829157 - 2¹¹ = 12161827109 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 (12161829107) 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 in 3 ways as a sum of consecutive naturals, for example, 8673928 + ... + 8675329.

It is an arithmetic number, because the mean of its divisors is an integer number (3044794779).

Almost surely, 2^12161829157 is an apocalyptic number.

It is an amenable number.

12161829157 is a deficient number, since it is larger than the sum of its proper divisors (17349959).

12161829157 is an equidigital number, since it uses as much as digits as its factorization.

12161829157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349958.

The product of its digits is 60480, while the sum is 43.

The spelling of 12161829157 in words is "twelve billion, one hundred sixty-one million, eight hundred twenty-nine thousand, one hundred fifty-seven".