11681355 has 48 divisors (see below), whose sum is σ = 22719744. Its totient is φ = 5100480.

The previous prime is 11681353. The next prime is 11681399. The reversal of 11681355 is 55318611.

It is not a de Polignac number, because 11681355 - 2¹ = 11681353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11681353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16560 + ... + 17250.

It is an arithmetic number, because the mean of its divisors is an integer number (473328).

Almost surely, 2^11681355 is an apocalyptic number.

11681355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11681355 is a deficient number, since it is larger than the sum of its proper divisors (11038389).

11681355 is a wasteful number, since it uses less digits than its factorization.

11681355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 729 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

The square root of 11681355 is about 3417.7997308210. The cubic root of 11681355 is about 226.8982123037.

Adding to 11681355 its reverse (55318611), we get a palindrome (66999966).

The spelling of 11681355 in words is "eleven million, six hundred eighty-one thousand, three hundred fifty-five".