11512535016165 has 16 divisors (see below), whose sum is σ = 18421477747200. Its totient is φ = 6139544768192.

The previous prime is 11512535016161. The next prime is 11512535016173. The reversal of 11512535016165 is 56161053521511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11512535016165 - 2² = 11512535016161 is a prime.

It is a super-2 number, since 2×11512535016165² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11512535016161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29418330 + ... + 29807099.

It is an arithmetic number, because the mean of its divisors is an integer number (1151342359200).

Almost surely, 2^{11512535016165} is an apocalyptic number.

11512535016165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11512535016165 is a deficient number, since it is larger than the sum of its proper divisors (6908942731035).

11512535016165 is a wasteful number, since it uses less digits than its factorization.

11512535016165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59238396.

The product of its (nonzero) digits is 135000, while the sum is 42.

Adding to 11512535016165 its reverse (56161053521511), we get a palindrome (67673588537676).

The spelling of 11512535016165 in words is "eleven trillion, five hundred twelve billion, five hundred thirty-five million, sixteen thousand, one hundred sixty-five".