11818742399 has 4 divisors (see below), whose sum is σ = 11819148000. Its totient is φ = 11818336800.

The previous prime is 11818742393. The next prime is 11818742401. The reversal of 11818742399 is 99324781811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99324781811 = 53 ⋅1874052487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11818742399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11818742399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11818742393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155399 + ... + 218600.

It is an arithmetic number, because the mean of its divisors is an integer number (2954787000).

Almost surely, 2^11818742399 is an apocalyptic number.

11818742399 is a deficient number, since it is larger than the sum of its proper divisors (405601).

11818742399 is an equidigital number, since it uses as much as digits as its factorization.

11818742399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405600.

The product of its digits is 870912, while the sum is 53.

The spelling of 11818742399 in words is "eleven billion, eight hundred eighteen million, seven hundred forty-two thousand, three hundred ninety-nine".