11812838394361 has 3 divisors (see below), whose sum is σ = 11812841831343. Its totient is φ = 11812834957380.

The previous prime is 11812838394341. The next prime is 11812838394407. The reversal of 11812838394361 is 16349383821811.

The square root of 11812838394361 is 3436981.

It is a perfect power (a square), and thus also a powerful number.

11812838394361 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 456612384361 + 11356226010000 = 675731^2 + 3369900^2 .

It is not a de Polignac number, because 11812838394361 - 2²⁷ = 11812704176633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11812838394296 and 11812838394305.

It is not an unprimeable number, because it can be changed into a prime (11812838394341) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1718491 + ... + 5155471.

It is an arithmetic number, because the mean of its divisors is an integer number (3937613943781).

Almost surely, 2^{11812838394361} is an apocalyptic number.

11812838394361 is the 3436981-st square number.

11812838394361 is the 1718491-st centered octagonal number.

It is an amenable number.

11812838394361 is a deficient number, since it is larger than the sum of its proper divisors (3436982).

11812838394361 is an frugal number, since it uses more digits than its factorization.

11812838394361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6873962 (or 3436981 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 58.

The spelling of 11812838394361 in words is "eleven trillion, eight hundred twelve billion, eight hundred thirty-eight million, three hundred ninety-four thousand, three hundred sixty-one".