11203440255503 has 8 divisors (see below), whose sum is σ = 11464045150800. Its totient is φ = 10942838077248.

The previous prime is 11203440255481. The next prime is 11203440255517. The reversal of 11203440255503 is 30555204430211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11203440255503 - 2¹⁶ = 11203440189967 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 (11203440255583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9374003 + ... + 10501371.

It is an arithmetic number, because the mean of its divisors is an integer number (1433005643850).

Almost surely, 2^{11203440255503} is an apocalyptic number.

11203440255503 is a deficient number, since it is larger than the sum of its proper divisors (260604895297).

11203440255503 is a wasteful number, since it uses less digits than its factorization.

11203440255503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358521.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 11203440255503 its reverse (30555204430211), we get a palindrome (41758644685714).

The spelling of 11203440255503 in words is "eleven trillion, two hundred three billion, four hundred forty million, two hundred fifty-five thousand, five hundred three".