11143340511553 has 4 divisors (see below), whose sum is σ = 11144034254848. Its totient is φ = 11142646768260.

The previous prime is 11143340511521. The next prime is 11143340511643. The reversal of 11143340511553 is 35511504334111.

It is a happy number.

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 11143340511553 - 2⁵ = 11143340511521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11143340521553) 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, 346847553 + ... + 346879678.

It is an arithmetic number, because the mean of its divisors is an integer number (2786008563712).

Almost surely, 2^{11143340511553} is an apocalyptic number.

It is an amenable number.

11143340511553 is a deficient number, since it is larger than the sum of its proper divisors (693743295).

11143340511553 is an equidigital number, since it uses as much as digits as its factorization.

11143340511553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693743294.

The product of its (nonzero) digits is 54000, while the sum is 37.

Adding to 11143340511553 its reverse (35511504334111), we get a palindrome (46654844845664).

The spelling of 11143340511553 in words is "eleven trillion, one hundred forty-three billion, three hundred forty million, five hundred eleven thousand, five hundred fifty-three".