11155644013 has 4 divisors (see below), whose sum is σ = 11157633568. Its totient is φ = 11153654460.

The previous prime is 11155644011. The next prime is 11155644053. The reversal of 11155644013 is 31044655111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11155644013 - 2¹ = 11155644011 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 (11155644011) 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, 986343 + ... + 997588.

It is an arithmetic number, because the mean of its divisors is an integer number (2789408392).

Almost surely, 2^11155644013 is an apocalyptic number.

It is an amenable number.

11155644013 is a deficient number, since it is larger than the sum of its proper divisors (1989555).

11155644013 is an equidigital number, since it uses as much as digits as its factorization.

11155644013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989554.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 11155644013 in words is "eleven billion, one hundred fifty-five million, six hundred forty-four thousand, thirteen".