11515823168 has 28 divisors (see below), whose sum is σ = 23469330252. Its totient is φ = 5602291200.

The previous prime is 11515823167. The next prime is 11515823173. The reversal of 11515823168 is 86132851511.

It can be written as a sum of positive squares in 2 ways, for example, as 9117958144 + 2397865024 = 95488^2 + 48968^2 .

It is a super-2 number, since 2×11515823168² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11515823167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2429183 + ... + 2433918.

Almost surely, 2^11515823168 is an apocalyptic number.

It is an amenable number.

11515823168 is an abundant number, since it is smaller than the sum of its proper divisors (11953507084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11515823168 is an equidigital number, since it uses as much as digits as its factorization.

11515823168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4863150 (or 4863140 counting only the distinct ones).

The product of its digits is 57600, while the sum is 41.

The spelling of 11515823168 in words is "eleven billion, five hundred fifteen million, eight hundred twenty-three thousand, one hundred sixty-eight".