11566644446 has 32 divisors (see below), whose sum is σ = 20494494720. Its totient is φ = 4793186016.

The previous prime is 11566644443. The next prime is 11566644473. The reversal of 11566644446 is 64444666511.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 11566644446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11566644443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51281 + ... + 160508.

It is an arithmetic number, because the mean of its divisors is an integer number (640452960).

Almost surely, 2^11566644446 is an apocalyptic number.

11566644446 is a deficient number, since it is larger than the sum of its proper divisors (8927850274).

11566644446 is a wasteful number, since it uses less digits than its factorization.

11566644446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211928.

The product of its digits is 1658880, while the sum is 47.

The spelling of 11566644446 in words is "eleven billion, five hundred sixty-six million, six hundred forty-four thousand, four hundred forty-six".