11556430206661 has 8 divisors (see below), whose sum is σ = 11664946707264. Its totient is φ = 11447923196640.

The previous prime is 11556430206619. The next prime is 11556430206697. The reversal of 11556430206661 is 16660203465511.

It is a happy number.

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 11556430206661 - 2²¹ = 11556428109509 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 (11556430206161) 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, 86041 + ... + 4808353.

It is an arithmetic number, because the mean of its divisors is an integer number (1458118338408).

Almost surely, 2^{11556430206661} is an apocalyptic number.

It is an amenable number.

11556430206661 is a deficient number, since it is larger than the sum of its proper divisors (108516500603).

11556430206661 is a wasteful number, since it uses less digits than its factorization.

11556430206661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745291.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 11556430206661 in words is "eleven trillion, five hundred fifty-six billion, four hundred thirty million, two hundred six thousand, six hundred sixty-one".