11603681887 has 4 divisors (see below), whose sum is σ = 13261350736. Its totient is φ = 9946013040.

The previous prime is 11603681879. The next prime is 11603681897. The reversal of 11603681887 is 78818630611.

11603681887 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: 78818630611 = 7 ⋅11259804373.

It is a cyclic number.

It is not a de Polignac number, because 11603681887 - 2³ = 11603681879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11603681887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11603681897) 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, 828834414 + ... + 828834427.

It is an arithmetic number, because the mean of its divisors is an integer number (3315337684).

Almost surely, 2^11603681887 is an apocalyptic number.

11603681887 is a deficient number, since it is larger than the sum of its proper divisors (1657668849).

11603681887 is an equidigital number, since it uses as much as digits as its factorization.

11603681887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657668848.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 11603681887 in words is "eleven billion, six hundred three million, six hundred eighty-one thousand, eight hundred eighty-seven".