11529878287 has 4 divisors (see below), whose sum is σ = 11530128960. Its totient is φ = 11529627616.

The previous prime is 11529878279. The next prime is 11529878293. The reversal of 11529878287 is 78287892511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78287892511 = 31019 ⋅2523869.

It is a cyclic number.

It is not a de Polignac number, because 11529878287 - 2³ = 11529878279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11529878257) 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 3 ways as a sum of consecutive naturals, for example, 34303 + ... + 155680.

It is an arithmetic number, because the mean of its divisors is an integer number (2882532240).

Almost surely, 2^11529878287 is an apocalyptic number.

11529878287 is a deficient number, since it is larger than the sum of its proper divisors (250673).

11529878287 is an equidigital number, since it uses as much as digits as its factorization.

11529878287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250672.

The product of its digits is 4515840, while the sum is 58.

The spelling of 11529878287 in words is "eleven billion, five hundred twenty-nine million, eight hundred seventy-eight thousand, two hundred eighty-seven".