11550415523545 has 4 divisors (see below), whose sum is σ = 13860498628260. Its totient is φ = 9240332418832.

The previous prime is 11550415523503. The next prime is 11550415523561. The reversal of 11550415523545 is 54532551405511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6998691414016 + 4551724109529 = 2645504^2 + 2133477^2 .

It is a cyclic number.

It is not a de Polignac number, because 11550415523545 - 2¹⁹ = 11550414999257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11550415523495 and 11550415523504.

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 3 ways as a sum of consecutive naturals, for example, 1155041552350 + ... + 1155041552359.

It is an arithmetic number, because the mean of its divisors is an integer number (3465124657065).

Almost surely, 2^{11550415523545} is an apocalyptic number.

It is an amenable number.

11550415523545 is a deficient number, since it is larger than the sum of its proper divisors (2310083104715).

11550415523545 is an equidigital number, since it uses as much as digits as its factorization.

11550415523545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310083104714.

The product of its (nonzero) digits is 1500000, while the sum is 46.

The spelling of 11550415523545 in words is "eleven trillion, five hundred fifty billion, four hundred fifteen million, five hundred twenty-three thousand, five hundred forty-five".