11550203231265 has 48 divisors (see below), whose sum is σ = 20285880563520. Its totient is φ = 6078932795520.

The previous prime is 11550203231251. The next prime is 11550203231267. The reversal of 11550203231265 is 56213230205511.

11550203231265 is a `hidden beast` number, since 1 + 1 + 5 + 50 + 20 + 323 + 1 + 265 = 666.

It is not a de Polignac number, because 11550203231265 - 2⁵ = 11550203231233 is a prime.

It is a super-3 number, since 3×11550203231265³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11550203231267) 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 47 ways as a sum of consecutive naturals, for example, 4417762 + ... + 6528171.

It is an arithmetic number, because the mean of its divisors is an integer number (422622511740).

Almost surely, 2^{11550203231265} is an apocalyptic number.

11550203231265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11550203231265 is a deficient number, since it is larger than the sum of its proper divisors (8735677332255).

11550203231265 is a wasteful number, since it uses less digits than its factorization.

11550203231265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10946254 (or 10946251 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 11550203231265 its reverse (56213230205511), we get a palindrome (67763433436776).

The spelling of 11550203231265 in words is "eleven trillion, five hundred fifty billion, two hundred three million, two hundred thirty-one thousand, two hundred sixty-five".