11721544003 has 4 divisors (see below), whose sum is σ = 12623201248. Its totient is φ = 10819886760.

The previous prime is 11721543947. The next prime is 11721544039. The reversal of 11721544003 is 30044512711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11721544003 - 2¹³ = 11721535811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11721544063) 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, 450828603 + ... + 450828628.

It is an arithmetic number, because the mean of its divisors is an integer number (3155800312).

Almost surely, 2^11721544003 is an apocalyptic number.

11721544003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11721544003 is a deficient number, since it is larger than the sum of its proper divisors (901657245).

11721544003 is an equidigital number, since it uses as much as digits as its factorization.

11721544003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901657244.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 11721544003 in words is "eleven billion, seven hundred twenty-one million, five hundred forty-four thousand, three".