11648436661 has 4 divisors (see below), whose sum is σ = 11652613024. Its totient is φ = 11644260300.

The previous prime is 11648436643. The next prime is 11648436689. The reversal of 11648436661 is 16663484611.

11648436661 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 11648436661 - 2⁵ = 11648436629 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 (11648436461) 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, 2083995 + ... + 2089576.

It is an arithmetic number, because the mean of its divisors is an integer number (2913153256).

Almost surely, 2^11648436661 is an apocalyptic number.

It is an amenable number.

11648436661 is a deficient number, since it is larger than the sum of its proper divisors (4176363).

11648436661 is an equidigital number, since it uses as much as digits as its factorization.

11648436661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176362.

The product of its digits is 497664, while the sum is 46.

The spelling of 11648436661 in words is "eleven billion, six hundred forty-eight million, four hundred thirty-six thousand, six hundred sixty-one".