11144420513 has 4 divisors (see below), whose sum is σ = 11176353300. Its totient is φ = 11112487728.

The previous prime is 11144420509. The next prime is 11144420579. The reversal of 11144420513 is 31502444111.

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 9973617424 + 1170803089 = 99868^2 + 34217^2 .

It is a cyclic number.

It is not a de Polignac number, because 11144420513 - 2² = 11144420509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11144420213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15965870 + ... + 15966567.

It is an arithmetic number, because the mean of its divisors is an integer number (2794088325).

Almost surely, 2^11144420513 is an apocalyptic number.

It is an amenable number.

11144420513 is a deficient number, since it is larger than the sum of its proper divisors (31932787).

11144420513 is an equidigital number, since it uses as much as digits as its factorization.

11144420513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31932786.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 11144420513 its reverse (31502444111), we get a palindrome (42646864624).

The spelling of 11144420513 in words is "eleven billion, one hundred forty-four million, four hundred twenty thousand, five hundred thirteen".