11535809387 has 4 divisors (see below), whose sum is σ = 11731331640. Its totient is φ = 11340287136.

The previous prime is 11535809339. The next prime is 11535809407. The reversal of 11535809387 is 78390853511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78390853511 = 1889 ⋅41498599.

It is a cyclic number.

It is not a de Polignac number, because 11535809387 - 2²⁴ = 11519032171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11535809687) 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, 97761038 + ... + 97761155.

It is an arithmetic number, because the mean of its divisors is an integer number (2932832910).

Almost surely, 2^11535809387 is an apocalyptic number.

11535809387 is a deficient number, since it is larger than the sum of its proper divisors (195522253).

11535809387 is an equidigital number, since it uses as much as digits as its factorization.

11535809387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195522252.

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 11535809387 in words is "eleven billion, five hundred thirty-five million, eight hundred nine thousand, three hundred eighty-seven".