11816815311929 has 4 divisors (see below), whose sum is σ = 11816965986384. Its totient is φ = 11816664637476.

The previous prime is 11816815311883. The next prime is 11816815311941. The reversal of 11816815311929 is 92911351861811.

11816815311929 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11816815311929 - 2²⁴ = 11816798534713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11816815314929) 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, 75219527 + ... + 75376460.

It is an arithmetic number, because the mean of its divisors is an integer number (2954241496596).

Almost surely, 2^{11816815311929} is an apocalyptic number.

It is an amenable number.

11816815311929 is a deficient number, since it is larger than the sum of its proper divisors (150674455).

11816815311929 is an equidigital number, since it uses as much as digits as its factorization.

11816815311929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150674454.

The product of its digits is 933120, while the sum is 56.

The spelling of 11816815311929 in words is "eleven trillion, eight hundred sixteen billion, eight hundred fifteen million, three hundred eleven thousand, nine hundred twenty-nine".