11687864033 has 4 divisors (see below), whose sum is σ = 11748423108. Its totient is φ = 11627304960.

The previous prime is 11687864017. The next prime is 11687864051. The reversal of 11687864033 is 33046878611.

11687864033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33046878611 = 7741 ⋅4269071.

It can be written as a sum of positive squares in 2 ways, for example, as 1367742289 + 10320121744 = 36983^2 + 101588^2 .

It is a cyclic number.

It is not a de Polignac number, because 11687864033 - 2⁴ = 11687864017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11687864093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30279248 + ... + 30279633.

It is an arithmetic number, because the mean of its divisors is an integer number (2937105777).

Almost surely, 2^11687864033 is an apocalyptic number.

It is an amenable number.

11687864033 is a deficient number, since it is larger than the sum of its proper divisors (60559075).

11687864033 is an equidigital number, since it uses as much as digits as its factorization.

11687864033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60559074.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 11687864033 in words is "eleven billion, six hundred eighty-seven million, eight hundred sixty-four thousand, thirty-three".