11115131656 has 16 divisors (see below), whose sum is σ = 20842194240. Its totient is φ = 5557213200.

The previous prime is 11115131647. The next prime is 11115131771. The reversal of 11115131656 is 65613151111.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130605 + ... + 198211.

It is an arithmetic number, because the mean of its divisors is an integer number (1302637140).

Almost surely, 2^11115131656 is an apocalyptic number.

It is an amenable number.

11115131656 is a deficient number, since it is larger than the sum of its proper divisors (9727062584).

11115131656 is a wasteful number, since it uses less digits than its factorization.

11115131656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88164 (or 88160 counting only the distinct ones).

The product of its digits is 2700, while the sum is 31.

Adding to 11115131656 its reverse (65613151111), we get a palindrome (76728282767).

The spelling of 11115131656 in words is "eleven billion, one hundred fifteen million, one hundred thirty-one thousand, six hundred fifty-six".