11816812379 has 4 divisors (see below), whose sum is σ = 11833670160. Its totient is φ = 11799954600.

The previous prime is 11816812331. The next prime is 11816812411. The reversal of 11816812379 is 97321861811.

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

It is a cyclic number.

It is not a de Polignac number, because 11816812379 - 2⁸ = 11816812123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11816812079) 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, 8427839 + ... + 8429240.

It is an arithmetic number, because the mean of its divisors is an integer number (2958417540).

Almost surely, 2^11816812379 is an apocalyptic number.

11816812379 is a deficient number, since it is larger than the sum of its proper divisors (16857781).

11816812379 is an equidigital number, since it uses as much as digits as its factorization.

11816812379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16857780.

The product of its digits is 145152, while the sum is 47.

The spelling of 11816812379 in words is "eleven billion, eight hundred sixteen million, eight hundred twelve thousand, three hundred seventy-nine".