11786538238 has 4 divisors (see below), whose sum is σ = 17679807360. Its totient is φ = 5893269118.

The previous prime is 11786538229. The next prime is 11786538271. The reversal of 11786538238 is 83283568711.

It is a happy number.

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

It is a super-2 number, since 2×11786538238² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2946634558 + ... + 2946634561.

It is an arithmetic number, because the mean of its divisors is an integer number (4419951840).

Almost surely, 2^11786538238 is an apocalyptic number.

11786538238 is a deficient number, since it is larger than the sum of its proper divisors (5893269122).

11786538238 is an equidigital number, since it uses as much as digits as its factorization.

11786538238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893269121.

The product of its digits is 1935360, while the sum is 52.

The spelling of 11786538238 in words is "eleven billion, seven hundred eighty-six million, five hundred thirty-eight thousand, two hundred thirty-eight".