11566235087 has 4 divisors (see below), whose sum is σ = 12617711016. Its totient is φ = 10514759160.

The previous prime is 11566235077. The next prime is 11566235143. The reversal of 11566235087 is 78053266511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78053266511 = 11 ⋅7095751501.

It is a cyclic number.

It is not a de Polignac number, because 11566235087 - 2⁸ = 11566234831 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 (11566235027) 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, 525737948 + ... + 525737969.

It is an arithmetic number, because the mean of its divisors is an integer number (3154427754).

Almost surely, 2^11566235087 is an apocalyptic number.

11566235087 is a deficient number, since it is larger than the sum of its proper divisors (1051475929).

11566235087 is a wasteful number, since it uses less digits than its factorization.

11566235087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051475928.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 11566235087 in words is "eleven billion, five hundred sixty-six million, two hundred thirty-five thousand, eighty-seven".