11556656601 has 8 divisors (see below), whose sum is σ = 17610143424. Its totient is φ = 6603803760.

The previous prime is 11556656599. The next prime is 11556656603. The reversal of 11556656601 is 10665665511.

11556656601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11556656599) and next prime (11556656603).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11556656601 - 2¹ = 11556656599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11556656603) 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 7 ways as a sum of consecutive naturals, for example, 275158470 + ... + 275158511.

It is an arithmetic number, because the mean of its divisors is an integer number (2201267928).

Almost surely, 2^11556656601 is an apocalyptic number.

It is an amenable number.

11556656601 is a deficient number, since it is larger than the sum of its proper divisors (6053486823).

11556656601 is an equidigital number, since it uses as much as digits as its factorization.

11556656601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550316991.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 11556656601 in words is "eleven billion, five hundred fifty-six million, six hundred fifty-six thousand, six hundred one".