11153231865 has 24 divisors (see below), whose sum is σ = 19365248448. Its totient is φ = 5938242720.

The previous prime is 11153231839. The next prime is 11153231879. The reversal of 11153231865 is 56813235111.

It is a happy number.

11153231865 is a `hidden beast` number, since 1 + 11 + 532 + 31 + 86 + 5 = 666.

It is not a de Polignac number, because 11153231865 - 2⁵ = 11153231833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184701 + ... + 237530.

It is an arithmetic number, because the mean of its divisors is an integer number (806885352).

Almost surely, 2^11153231865 is an apocalyptic number.

11153231865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11153231865 is a deficient number, since it is larger than the sum of its proper divisors (8212016583).

11153231865 is a wasteful number, since it uses less digits than its factorization.

11153231865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422829 (or 422826 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

Adding to 11153231865 its reverse (56813235111), we get a palindrome (67966466976).

The spelling of 11153231865 in words is "eleven billion, one hundred fifty-three million, two hundred thirty-one thousand, eight hundred sixty-five".