11155441553 has 4 divisors (see below), whose sum is σ = 11183541300. Its totient is φ = 11127341808.

The previous prime is 11155441547. The next prime is 11155441589. The reversal of 11155441553 is 35514455111.

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 5702062144 + 5453379409 = 75512^2 + 73847^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155441553 - 2¹⁰ = 11155440529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11155441153) 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, 14049278 + ... + 14050071.

It is an arithmetic number, because the mean of its divisors is an integer number (2795885325).

Almost surely, 2^11155441553 is an apocalyptic number.

It is an amenable number.

11155441553 is a deficient number, since it is larger than the sum of its proper divisors (28099747).

11155441553 is an equidigital number, since it uses as much as digits as its factorization.

11155441553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28099746.

The product of its digits is 30000, while the sum is 35.

Adding to 11155441553 its reverse (35514455111), we get a palindrome (46669896664).

The spelling of 11155441553 in words is "eleven billion, one hundred fifty-five million, four hundred forty-one thousand, five hundred fifty-three".