11131115506 has 8 divisors (see below), whose sum is σ = 19081912320. Its totient is φ = 4770478068.

The previous prime is 11131115503. The next prime is 11131115507. The reversal of 11131115506 is 60551113111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11131115503) 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, 397539826 + ... + 397539853.

It is an arithmetic number, because the mean of its divisors is an integer number (2385239040).

Almost surely, 2^11131115506 is an apocalyptic number.

11131115506 is a deficient number, since it is larger than the sum of its proper divisors (7950796814).

11131115506 is an equidigital number, since it uses as much as digits as its factorization.

11131115506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795079688.

The product of its (nonzero) digits is 450, while the sum is 25.

Adding to 11131115506 its reverse (60551113111), we get a palindrome (71682228617).

The spelling of 11131115506 in words is "eleven billion, one hundred thirty-one million, one hundred fifteen thousand, five hundred six".