11287818871 has 8 divisors (see below), whose sum is σ = 13111846304. Its totient is φ = 9516661920.

The previous prime is 11287818869. The next prime is 11287818907. The reversal of 11287818871 is 17881878211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11287818871 - 2¹ = 11287818869 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 (11287818271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13217160 + ... + 13218013.

It is an arithmetic number, because the mean of its divisors is an integer number (1638980788).

Almost surely, 2^11287818871 is an apocalyptic number.

11287818871 is a deficient number, since it is larger than the sum of its proper divisors (1824027433).

11287818871 is an equidigital number, since it uses as much as digits as its factorization.

11287818871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26435241.

The product of its digits is 401408, while the sum is 52.

The spelling of 11287818871 in words is "eleven billion, two hundred eighty-seven million, eight hundred eighteen thousand, eight hundred seventy-one".