11118734399 has 4 divisors (see below), whose sum is σ = 11355303264. Its totient is φ = 10882165536.

The previous prime is 11118734387. The next prime is 11118734437. The reversal of 11118734399 is 99343781111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99343781111 = 28151 ⋅3528961.

It is a cyclic number.

It is not a de Polignac number, because 11118734399 - 2²⁴ = 11101957183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 236568817 = 11118734399 / (1 + 1 + 1 + 1 + 8 + 7 + 3 + 4 + 3 + 9 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11118734309) 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, 118284362 + ... + 118284455.

It is an arithmetic number, because the mean of its divisors is an integer number (2838825816).

Almost surely, 2^11118734399 is an apocalyptic number.

11118734399 is a deficient number, since it is larger than the sum of its proper divisors (236568865).

11118734399 is an equidigital number, since it uses as much as digits as its factorization.

11118734399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236568864.

The product of its digits is 163296, while the sum is 47.

The spelling of 11118734399 in words is "eleven billion, one hundred eighteen million, seven hundred thirty-four thousand, three hundred ninety-nine".