11534440155 has 32 divisors (see below), whose sum is σ = 21182114304. Its totient is φ = 5250245376.

The previous prime is 11534440147. The next prime is 11534440157. The reversal of 11534440155 is 55104443511.

It is not a de Polignac number, because 11534440155 - 2³ = 11534440147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11534440157) 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 31 ways as a sum of consecutive naturals, for example, 211269 + ... + 260198.

It is an arithmetic number, because the mean of its divisors is an integer number (661941072).

Almost surely, 2^11534440155 is an apocalyptic number.

11534440155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11534440155 is a deficient number, since it is larger than the sum of its proper divisors (9647674149).

11534440155 is a wasteful number, since it uses less digits than its factorization.

11534440155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471715.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 11534440155 its reverse (55104443511), we get a palindrome (66638883666).

The spelling of 11534440155 in words is "eleven billion, five hundred thirty-four million, four hundred forty thousand, one hundred fifty-five".