11641603609 has 4 divisors (see below), whose sum is σ = 11788965760. Its totient is φ = 11494241460.

The previous prime is 11641603607. The next prime is 11641603619. The reversal of 11641603609 is 90630614611.

11641603609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11641603609 - 2¹ = 11641603607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11641603607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73680957 + ... + 73681114.

It is an arithmetic number, because the mean of its divisors is an integer number (2947241440).

Almost surely, 2^11641603609 is an apocalyptic number.

It is an amenable number.

11641603609 is a deficient number, since it is larger than the sum of its proper divisors (147362151).

11641603609 is an equidigital number, since it uses as much as digits as its factorization.

11641603609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147362150.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 11641603609 in words is "eleven billion, six hundred forty-one million, six hundred three thousand, six hundred nine".