11551105104013 has 4 divisors (see below), whose sum is σ = 11769050483388. Its totient is φ = 11333159724640.

The previous prime is 11551105103911. The next prime is 11551105104017. The reversal of 11551105104013 is 31040150115511.

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 7727410351684 + 3823694752329 = 2779822^2 + 1955427^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551105104013 - 2⁹ = 11551105103501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551105104017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108972689608 + ... + 108972689713.

It is an arithmetic number, because the mean of its divisors is an integer number (2942262620847).

Almost surely, 2^{11551105104013} is an apocalyptic number.

It is an amenable number.

11551105104013 is a deficient number, since it is larger than the sum of its proper divisors (217945379375).

11551105104013 is an equidigital number, since it uses as much as digits as its factorization.

11551105104013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217945379374.

The product of its (nonzero) digits is 1500, while the sum is 28.

Adding to 11551105104013 its reverse (31040150115511), we get a palindrome (42591255219524).

The spelling of 11551105104013 in words is "eleven trillion, five hundred fifty-one billion, one hundred five million, one hundred four thousand, thirteen".