11566047880 has 16 divisors (see below), whose sum is σ = 26023607820. Its totient is φ = 4626419136.

The previous prime is 11566047853. The next prime is 11566047917. The reversal of 11566047880 is 8874066511.

It can be written as a sum of positive squares in 2 ways, for example, as 10807265764 + 758782116 = 103958^2 + 27546^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11566047880.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144575559 + ... + 144575638.

Almost surely, 2^11566047880 is an apocalyptic number.

11566047880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11566047880 is an abundant number, since it is smaller than the sum of its proper divisors (14457559940).

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

11566047880 is a wasteful number, since it uses less digits than its factorization.

11566047880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289151208 (or 289151204 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 11566047880 in words is "eleven billion, five hundred sixty-six million, forty-seven thousand, eight hundred eighty".