11155243455 has 160 divisors (see below), whose sum is σ = 21497591808. Its totient is φ = 5521824000.

The previous prime is 11155243441. The next prime is 11155243459. The reversal of 11155243455 is 55434255111.

11155243455 is a `hidden beast` number, since 1 + 11 + 552 + 43 + 4 + 55 = 666.

It is not a de Polignac number, because 11155243455 - 2⁴ = 11155243439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155243459) by changing a digit.

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 159 ways as a sum of consecutive naturals, for example, 66797782 + ... + 66797948.

Almost surely, 2^11155243455 is an apocalyptic number.

11155243455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11155243455 is a deficient number, since it is larger than the sum of its proper divisors (10342348353).

11155243455 is a wasteful number, since it uses less digits than its factorization.

11155243455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 370 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

Adding to 11155243455 its reverse (55434255111), we get a palindrome (66589498566).

The spelling of 11155243455 in words is "eleven billion, one hundred fifty-five million, two hundred forty-three thousand, four hundred fifty-five".