11550405503 has 8 divisors (see below), whose sum is σ = 14215883808. Its totient is φ = 9138782304.

The previous prime is 11550405497. The next prime is 11550405521. The reversal of 11550405503 is 30550405511.

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 11550405503 - 2⁶ = 11550405439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550405533) 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, 63463676 + ... + 63463857.

It is an arithmetic number, because the mean of its divisors is an integer number (1776985476).

Almost surely, 2^11550405503 is an apocalyptic number.

11550405503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11550405503 is a deficient number, since it is larger than the sum of its proper divisors (2665478305).

11550405503 is a wasteful number, since it uses less digits than its factorization.

11550405503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126927553.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 11550405503 in words is "eleven billion, five hundred fifty million, four hundred five thousand, five hundred three".