11664321511 has 4 divisors (see below), whose sum is σ = 11675882800. Its totient is φ = 11652760224.

The previous prime is 11664321479. The next prime is 11664321523. The reversal of 11664321511 is 11512346611.

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 11664321511 - 2⁵ = 11664321479 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 (11664721511) 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, 5779131 + ... + 5781148.

It is an arithmetic number, because the mean of its divisors is an integer number (2918970700).

Almost surely, 2^11664321511 is an apocalyptic number.

11664321511 is a deficient number, since it is larger than the sum of its proper divisors (11561289).

11664321511 is a wasteful number, since it uses less digits than its factorization.

11664321511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11561288.

The product of its digits is 4320, while the sum is 31.

The spelling of 11664321511 in words is "eleven billion, six hundred sixty-four million, three hundred twenty-one thousand, five hundred eleven".