11144420515 has 4 divisors (see below), whose sum is σ = 13373304624. Its totient is φ = 8915536408.

The previous prime is 11144420509. The next prime is 11144420579. The reversal of 11144420515 is 51502444111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51502444111 = 90401 ⋅569711.

It is a cyclic number.

It is not a de Polignac number, because 11144420515 - 2⁹ = 11144420003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114442047 + ... + 1114442056.

It is an arithmetic number, because the mean of its divisors is an integer number (3343326156).

Almost surely, 2^11144420515 is an apocalyptic number.

11144420515 is a deficient number, since it is larger than the sum of its proper divisors (2228884109).

11144420515 is an equidigital number, since it uses as much as digits as its factorization.

11144420515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228884108.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 11144420515 its reverse (51502444111), we get a palindrome (62646864626).

The spelling of 11144420515 in words is "eleven billion, one hundred forty-four million, four hundred twenty thousand, five hundred fifteen".