11618509648243 has 4 divisors (see below), whose sum is σ = 11618526315448. Its totient is φ = 11618492981040.

The previous prime is 11618509648241. The next prime is 11618509648267. The reversal of 11618509648243 is 34284690581611.

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

It is a cyclic number.

It is not a de Polignac number, because 11618509648243 - 2¹ = 11618509648241 is a prime.

It is the 3408594-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11618509648241) by changing a digit.

It is a nontrivial repunit in base 3408593.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7240146 + ... + 8698087.

It is an arithmetic number, because the mean of its divisors is an integer number (2904631578862).

Almost surely, 2^{11618509648243} is an apocalyptic number.

11618509648243 is a deficient number, since it is larger than the sum of its proper divisors (16667205).

11618509648243 is an equidigital number, since it uses as much as digits as its factorization.

11618509648243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16667204.

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 11618509648243 in words is "eleven trillion, six hundred eighteen billion, five hundred nine million, six hundred forty-eight thousand, two hundred forty-three".