11564443551066 has 32 divisors (see below), whose sum is σ = 27344497069440. Its totient is φ = 3190191324096.

The previous prime is 11564443551013. The next prime is 11564443551083. The reversal of 11564443551066 is 66015534446511.

It is a super-2 number, since 2×11564443551066² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4747307301 + ... + 4747309736.

It is an arithmetic number, because the mean of its divisors is an integer number (854515533420).

Almost surely, 2^{11564443551066} is an apocalyptic number.

11564443551066 is an abundant number, since it is smaller than the sum of its proper divisors (15780053518374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11564443551066 is a wasteful number, since it uses less digits than its factorization.

11564443551066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9494617078.

The product of its (nonzero) digits is 5184000, while the sum is 51.

Adding to 11564443551066 its reverse (66015534446511), we get a palindrome (77579977997577).

The spelling of 11564443551066 in words is "eleven trillion, five hundred sixty-four billion, four hundred forty-three million, five hundred fifty-one thousand, sixty-six".